[SOLVED] PC immediately hangs after login on kernel 6.16 and later

bitwanderer · 2026-05-06 10:35:55

When i connect an external monitor via HDMI, the system hangs with no further output in journal, the screens stay black and i have to long press the power button. I also tried to watch the journal via ssh while connecting the cable and the shell hangs too. The whole system is up to date except the kernel that i keep at 6.12.74-1-lts because is the last lts that works. I also tried booting from non lts kernel and other distros (Fedora43 and Ubuntu26.04) and there is the same problem.
output of lshw:

description: Notebook
    product: HP Laptop 15s-fq1xxx (8FG56EA#ABZ)
    vendor: HP
    version: Chassis Version
    width: 64 bits
    capabilities: smbios-3.2.0 dmi-3.2.0 smp vsyscall32
    configuration: boot=normal chassis=notebook family=103C_5335KV HP Notebook sku=8FG56EA#ABZ uuid=30444335-3531-5944-3637-375935314435
  *-core
       description: Motherboard
       product: 86C9
       vendor: HP
       physical id: 0
       version: 56.31
       slot: Base Board Chassis Location
     *-firmware
          description: BIOS
          vendor: AMI
          physical id: 0
          version: F.09
          date: 12/20/2019
          size: 64KiB
          capacity: 12MiB
          capabilities: pci upgrade shadowing cdboot bootselect edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb smartbattery biosbootspecification netboot uefi
     *-memory
          description: System Memory
          physical id: 12
          slot: System board or motherboard
          size: 16GiB
        *-bank:0
             description: SODIMM DDR4 Synchronous 2667 MHz (0,4 ns)
             product: RMSA3260NA78HAF-2666
             vendor: Fujitsu
             physical id: 0
             slot: Bottom - Slot 1 (left)
             size: 8GiB
             width: 64 bits
             clock: 2667MHz (0.4ns)
        *-bank:1
             description: SODIMM DDR4 Synchronous 2667 MHz (0,4 ns)
             product: RMSA3260NA78HAF-2666
             vendor: Fujitsu
             physical id: 1
             slot: Bottom - Slot 2 (right)
             size: 8GiB
             width: 64 bits
             clock: 2667MHz (0.4ns)
     *-cache:0
          description: L1 cache
          physical id: 1f
          slot: L1 Cache
          size: 192KiB
          capacity: 192KiB
          capabilities: synchronous internal write-back data
          configuration: level=1
     *-cache:1
          description: L1 cache
          physical id: 20
          slot: L1 Cache
          size: 128KiB
          capacity: 128KiB
          capabilities: synchronous internal write-back instruction
          configuration: level=1
     *-cache:2
          description: L2 cache
          physical id: 21
          slot: L2 Cache
          size: 2MiB
          capacity: 2MiB
          capabilities: synchronous internal write-back unified
          configuration: level=2
     *-cache:3
          description: L3 cache
          physical id: 22
          slot: L3 Cache
          size: 8MiB
          capacity: 8MiB
          capabilities: synchronous internal write-back unified
          configuration: level=3
     *-cpu
          description: CPU
          product: Intel(R) Core(TM) i7-1065G7 CPU @ 1.30GHz
          vendor: Intel Corp.
          physical id: 23
          bus info: cpu@0
          version: 6.126.5
          serial: To Be Filled By O.E.M.
          slot: U3E1
          size: 400MHz
          capacity: 4005MHz
          width: 64 bits
          clock: 100MHz
          capabilities: lm fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp x86-64 constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid avx512f avx512dq rdseed adx smap avx512ifma clflushopt intel_pt avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves split_lock_detect dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req vnmi avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq rdpid fsrm md_clear flush_l1d arch_capabilities cpufreq
          configuration: cores=4 enabledcores=4 microcode=204 threads=8
     *-pci
          description: Host bridge
          product: Ice Lake-LP Processor Host Bridge/DRAM Registers
          vendor: Intel Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 03
          width: 32 bits
          clock: 33MHz
          configuration: driver=icl_uncore
          resources: irq:0
        *-display
             description: VGA compatible controller
             product: Iris Plus Graphics G7
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             logical name: /dev/fb0
             version: 07
             width: 64 bits
             clock: 33MHz
             capabilities: pciexpress msi pm vga_controller bus_master cap_list rom fb
             configuration: depth=32 driver=i915 latency=0 mode=1920x1080 resolution=1920,1080 visual=truecolor xres=1920 yres=1080
             resources: iomemory:600-5ff iomemory:400-3ff irq:140 memory:6000000000-6000ffffff memory:4000000000-400fffffff ioport:4000(size=64) memory:c0000-dffff
        *-generic
             description: Signal processing controller
             product: Processor Power and Thermal Controller
             vendor: Intel Corporation
             physical id: 4
             bus info: pci@0000:00:04.0
             version: 03
             width: 64 bits
             clock: 33MHz
             capabilities: msi pm cap_list
             configuration: driver=proc_thermal latency=0
             resources: iomemory:600-5ff irq:16 memory:6001110000-600111ffff
        *-usb
             description: USB controller
             product: Ice Lake-LP USB 3.1 xHCI Host Controller
             vendor: Intel Corporation
             physical id: 14
             bus info: pci@0000:00:14.0
             version: 30
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi xhci bus_master cap_list
             configuration: driver=xhci_hcd latency=0
             resources: iomemory:600-5ff irq:123 memory:6001100000-600110ffff
           *-usbhost:0
                product: xHCI Host Controller
                vendor: Linux 6.12.74-1-lts xhci-hcd
                physical id: 0
                bus info: usb@1
                logical name: usb1
                version: 6.12
                capabilities: usb-2.00
                configuration: driver=hub slots=12 speed=480Mbit/s
              *-usb:0
                   description: Keyboard
                   product: USB Receiver
                   vendor: Logitech
                   physical id: 2
                   bus info: usb@1:2
                   version: 24.11
                   capabilities: usb-2.00
                   configuration: driver=usbhid maxpower=98mA speed=12Mbit/s
                 *-input
                      product: Logitech MX Master 3
                      physical id: 0
                      logical name: input33
                      logical name: /dev/input/event19
                      logical name: input33::capslock
                      logical name: input33::compose
                      logical name: input33::kana
                      logical name: input33::numlock
                      logical name: input33::scrolllock
                      logical name: /dev/input/mouse2
                      capabilities: usb
              *-usb:1
                   description: Video
                   product: HP TrueVision HD Camera
                   vendor: Azurewave
                   physical id: 3
                   bus info: usb@1:3
                   version: 18.03
                   serial: 0001
                   capabilities: usb-2.01
                   configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
              *-usb:2
                   description: USB hub
                   product: USB2.1 Hub
                   vendor: GenesysLogic
                   physical id: 4
                   bus info: usb@1:4
                   version: 6.56
                   capabilities: usb-2.10
                   configuration: driver=hub maxpower=100mA slots=4 speed=480Mbit/s
                 *-usb
                      description: Keyboard
                      product: Logitech USB Keyboard System Control
                      vendor: Logitech
                      physical id: 3
                      bus info: usb@1:4.3
                      logical name: input5
                      logical name: /dev/input/event5
                      logical name: input5::capslock
                      logical name: input5::numlock
                      logical name: input5::scrolllock
                      logical name: input6
                      logical name: /dev/input/event6
                      logical name: input7
                      logical name: /dev/input/event7
                      version: 86.00
                      capabilities: usb-1.10 usb
                      configuration: driver=usbhid maxpower=98mA speed=1Mbit/s
              *-usb:3 UNCLAIMED
                   description: Generic USB device
                   product: ELAN:ARM-M4
                   vendor: ELAN
                   physical id: 7
                   bus info: usb@1:7
                   version: 2.81
                   capabilities: usb-2.00
                   configuration: maxpower=100mA speed=12Mbit/s
              *-usb:4
                   description: Bluetooth wireless interface
                   product: Bluetooth Radio
                   vendor: Realtek
                   physical id: a
                   bus info: usb@1:a
                   version: 1.10
                   capabilities: bluetooth usb-1.10
                   configuration: driver=btusb maxpower=500mA speed=12Mbit/s
           *-usbhost:1
                product: xHCI Host Controller
                vendor: Linux 6.12.74-1-lts xhci-hcd
                physical id: 1
                bus info: usb@2
                logical name: usb2
                version: 6.12
                capabilities: usb-3.10
                configuration: driver=hub slots=6 speed=10000Mbit/s
              *-usb
                   description: USB hub
                   product: USB3.1 Hub
                   vendor: GenesysLogic
                   physical id: 4
                   bus info: usb@2:4
                   version: 6.56
                   capabilities: usb-3.20
                   configuration: driver=hub slots=4 speed=5000Mbit/s
                 *-usb
                      description: Generic USB device
                      product: USB 10/100/1000 LAN
                      vendor: Realtek
                      physical id: 4
                      bus info: usb@2:4.4
                      version: 30.00
                      serial: 000001
                      capabilities: usb-3.00
                      configuration: driver=r8152 maxpower=288mA speed=5000Mbit/s
        *-memory UNCLAIMED
             description: RAM memory
             product: Ice Lake-LP DRAM Controller
             vendor: Intel Corporation
             physical id: 14.2
             bus info: pci@0000:00:14.2
             version: 30
             width: 64 bits
             clock: 33MHz (30.3ns)
             capabilities: pm cap_list
             configuration: latency=0
             resources: iomemory:600-5ff iomemory:600-5ff memory:6001124000-6001125fff memory:600112a000-600112afff
        *-serial:0
             description: Serial bus controller
             product: Ice Lake-LP Serial IO I2C Controller #0
             vendor: Intel Corporation
             physical id: 15
             bus info: pci@0000:00:15.0
             version: 30
             width: 64 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=intel-lpss latency=0
             resources: iomemory:400-3ff irq:16 memory:4010000000-4010000fff
        *-serial:1
             description: Serial bus controller
             product: Ice Lake-LP Serial IO I2C Controller #1
             vendor: Intel Corporation
             physical id: 15.1
             bus info: pci@0000:00:15.1
             version: 30
             width: 64 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=intel-lpss latency=0
             resources: irq:17 memory:4010001000-4010001fff
        *-communication
             description: Communication controller
             product: Ice Lake-LP Management Engine
             vendor: Intel Corporation
             physical id: 16
             bus info: pci@0000:00:16.0
             version: 30
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=mei_me latency=0
             resources: iomemory:600-5ff irq:141 memory:6001127000-6001127fff
        *-raid
             description: RAID bus controller
             product: 82801 Mobile SATA Controller [RAID mode]
             vendor: Intel Corporation
             physical id: 17
             bus info: pci@0000:00:17.0
             version: 30
             width: 32 bits
             clock: 66MHz
             capabilities: raid msix pm vendor_specific bus_master cap_list
             configuration: driver=ahci latency=0
             resources: irq:16 memory:80600000-80601fff memory:80603000-806030ff ioport:4090(size=8) ioport:4080(size=4) ioport:4060(size=32) memory:80602000-806027ff
        *-pci:0
             description: PCI bridge
             product: Ice Lake-LP PCIe Port #8
             vendor: Intel Corporation
             physical id: 1c
             bus info: pci@0000:00:1c.0
             version: 30
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:120 ioport:3000(size=4096) memory:80500000-805fffff
           *-network
                description: Wireless interface
                product: RTL8821CE 802.11ac PCIe Wireless Network Adapter
                vendor: Realtek Semiconductor Co., Ltd.
                physical id: 0
                bus info: pci@0000:01:00.0
                logical name: wlo1
                version: 00
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
                configuration: broadcast=yes driver=rtw_8821ce driverversion=6.12.74-1-lts firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11
                resources: irq:143 ioport:3000(size=256) memory:80500000-8050ffff
        *-pci:1
             description: PCI bridge
             product: Ice Lake-LP PCI Express Root Port #9
             vendor: Intel Corporation
             physical id: 1d
             bus info: pci@0000:00:1d.0
             version: 30
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:121 memory:80400000-804fffff
           *-nvme
                description: NVMe device
                product: Samsung SSD 980 PRO 1TB
                vendor: Samsung Electronics Co Ltd
                physical id: 0
                bus info: pci@0000:02:00.0
                logical name: /dev/nvme0
                version: 5B2QGXA7
                width: 64 bits
                clock: 33MHz
                capabilities: nvme pm msi pciexpress msix nvm_express bus_master cap_list
                configuration: driver=nvme latency=0 nqn=nqn.1994-11.com.samsung:nvme:980PRO:M.2:S5GXNF0W152727B state=live
                resources: irq:16 memory:80400000-80403fff
              *-namespace:0
                   description: NVMe disk
                   physical id: 0
                   logical name: hwmon3
              *-namespace:1
                   description: NVMe disk
                   physical id: 2
                   logical name: /dev/ng0n1
              *-namespace:2
                   description: NVMe disk
                   physical id: 1
                   bus info: nvme@0:1
                   logical name: /dev/nvme0n1
                   size: 931GiB (1TB)
                   capabilities: gpt-1.00 partitioned partitioned:gpt
                   configuration: guid=5e501bdf-650e-4bb3-bde3-c05dd386fce8 logicalsectorsize=512 sectorsize=512 wwid=eui.002538b131b5af49
                 *-volume:0
                      description: Windows FAT volume
                      vendor: mkfs.fat
                      physical id: 1
                      bus info: nvme@0:1,1
                      logical name: /dev/nvme0n1p1
                      logical name: /boot
                      version: FAT32
                      size: 1022MiB
                      capacity: 1023MiB
                      capabilities: boot fat initialized
                      configuration: FATs=2 filesystem=fat mount.fstype=vfat mount.options=rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro name=EFI system partition state=mounted
                 *-volume:1
                      description: EFI partition
                      physical id: 2
                      bus info: nvme@0:1,2
                      logical name: /dev/nvme0n1p2
                      size: 930GiB
                      capacity: 930GiB
                      width: 840590048 bits
                      capabilities: encrypted luks initialized
                      configuration: bits=18020459232 filesystem=luks hash=sha256 name=root version=2
        *-isa
             description: ISA bridge
             product: Ice Lake-LP LPC Controller
             vendor: Intel Corporation
             physical id: 1f
             bus info: pci@0000:00:1f.0
             version: 30
             width: 32 bits
             clock: 33MHz
             capabilities: isa bus_master
             configuration: latency=0
           *-pnp00:00
                product: Motherboard registers
                physical id: 0
                capabilities: pnp
                configuration: driver=system
           *-pnp00:01
                product: PnP device HPQ8001
                vendor: Hewlett-Packard Co.
                physical id: 1
                capabilities: pnp
                configuration: driver=i8042 kbd
           *-pnp00:02
                product: Motherboard registers
                physical id: 2
                capabilities: pnp
                configuration: driver=system
           *-pnp00:03
                product: Motherboard registers
                physical id: 3
                capabilities: pnp
                configuration: driver=system
           *-pnp00:04
                product: Motherboard registers
                physical id: 4
                capabilities: pnp
                configuration: driver=system
           *-pnp00:05
                product: Motherboard registers
                physical id: 5
                capabilities: pnp
                configuration: driver=system
        *-multimedia
             description: Audio device
             product: Ice Lake-LP Smart Sound Technology Audio Controller
             vendor: Intel Corporation
             physical id: 1f.3
             bus info: pci@0000:00:1f.3
             logical name: card0
             logical name: /dev/snd/controlC0
             logical name: /dev/snd/hwC0D0
             logical name: /dev/snd/hwC0D2
             logical name: /dev/snd/pcmC0D0c
             logical name: /dev/snd/pcmC0D0p
             logical name: /dev/snd/pcmC0D3p
             logical name: /dev/snd/pcmC0D7p
             logical name: /dev/snd/pcmC0D8p
             logical name: /dev/snd/pcmC0D9p
             version: 30
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi hda_compatible bus_master cap_list
             configuration: driver=snd_hda_intel latency=32
             resources: iomemory:600-5ff iomemory:600-5ff irq:142 memory:6001120000-6001123fff memory:6001000000-60010fffff
           *-input:0
                product: HDA Intel PCH Mic
                physical id: 0
                logical name: input17
                logical name: /dev/input/event13
           *-input:1
                product: HDA Intel PCH Headphone
                physical id: 1
                logical name: input18
                logical name: /dev/input/event14
           *-input:2
                product: HDA Intel PCH HDMI/DP,pcm=3
                physical id: 2
                logical name: input19
                logical name: /dev/input/event15
           *-input:3
                product: HDA Intel PCH HDMI/DP,pcm=7
                physical id: 3
                logical name: input20
                logical name: /dev/input/event16
           *-input:4
                product: HDA Intel PCH HDMI/DP,pcm=8
                physical id: 4
                logical name: input21
                logical name: /dev/input/event17
           *-input:5
                product: HDA Intel PCH HDMI/DP,pcm=9
                physical id: 5
                logical name: input22
                logical name: /dev/input/event18
        *-serial:2
             description: SMBus
             product: Ice Lake-LP SMBus Controller
             vendor: Intel Corporation
             physical id: 1f.4
             bus info: pci@0000:00:1f.4
             version: 30
             width: 64 bits
             clock: 33MHz
             configuration: driver=i801_smbus latency=0
             resources: iomemory:600-5ff irq:16 memory:6001126000-60011260ff ioport:efa0(size=32)
        *-serial:3
             description: Serial bus controller
             product: Ice Lake-LP SPI Controller
             vendor: Intel Corporation
             physical id: 1f.5
             bus info: pci@0000:00:1f.5
             version: 30
             width: 32 bits
             clock: 33MHz
             configuration: driver=intel-spi latency=0
             resources: irq:0 memory:80604000-80604fff
  *-battery
       product: HT03041XL
       vendor: 333-42-5C-A
       physical id: 1
       slot: Primary
       capacity: 41920mWh
       configuration: voltage=11,6V
  *-input:0
       product: Lid Switch
       physical id: 2
       logical name: input0
       logical name: /dev/input/event0
       capabilities: platform
  *-input:1
       product: Power Button
       physical id: 3
       logical name: input1
       logical name: /dev/input/event1
       capabilities: platform
  *-input:2
       product: HP WMI hotkeys
       physical id: 4
       logical name: input13
       logical name: /dev/input/event10
       capabilities: platform
  *-input:3
       product: ELAN0712:00 04F3:30FD Mouse
       physical id: 5
       logical name: input14
       logical name: /dev/input/event11
       logical name: /dev/input/mouse0
       capabilities: i2c
  *-input:4
       product: ELAN0712:00 04F3:30FD Touchpad
       physical id: 6
       logical name: input16
       logical name: /dev/input/event12
       logical name: /dev/input/mouse1
       capabilities: i2c
  *-input:5
       product: Power Button
       physical id: 7
       logical name: input2
       logical name: /dev/input/event2
       capabilities: platform
  *-input:6
       product: AT Translated Set 2 keyboard
       physical id: 8
       logical name: input3
       logical name: /dev/input/event3
       logical name: input3::capslock
       logical name: input3::numlock
       logical name: input3::scrolllock
       capabilities: i8042
  *-input:7
       product: Video Bus
       physical id: 9
       logical name: input4
       logical name: /dev/input/event4
       capabilities: platform
  *-input:8
       product: Wireless hotkeys
       physical id: a
       logical name: input8
       logical name: /dev/input/event8
       capabilities: platform
  *-input:9
       product: PC Speaker
       physical id: b
       logical name: input9
       logical name: /dev/input/event9
       capabilities: isa
  *-network
       description: Ethernet interface
       product: USB 10/100/1000 LAN
       physical id: c
       bus info: usb@2:4.4
       logical name: enp0s20f0u4u4
       size: 1Gbit/s
       capacity: 1Gbit/s
       capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8152 driverversion=v1.12.13 duplex=full firmware=rtl8153a-4 v3 06/12/25

Last edited by bitwanderer (2026-05-15 20:50:03)

seth · 2026-05-06 12:08:19

the screens stay black and i have to long press the power button

Try to reboot w/ the https://wiki.archlinux.org/title/Keyboa … el_(SysRq) (all of the REISUB, nb. you'll have to explicitly enable that first) for any chance to preserve a journal, then post one anyway.
Does this even happen when only booting the multi-user.target?

For clarification, you're using 6.12.74-1-lts and that does NOT exhibit this behavior, it happens on the 6.18.x-lts kernels - did you test any version inbetween?
https://archive.archlinux.org/packages/l/linux/

Ftr, "Iris Plus Graphics G7" seems to be an IceLake chip.

bitwanderer · 2026-05-06 16:43:22

I tested REISUB and it doesn't work when the problem happens but it works if the problem is not triggered. It happens even when I boot in multi-user.target. I tested with a lot of versions today:

until 6.15.9.arch1-1 everything is ok
between 6.16.arch1-1 and 6.18.13.arch1-1 the problem is triggered immediately after login even without plugging the HDMI
after 6.19.5.arch1-1 the problem is triggered only when I plug in the HDMI

seth · 2026-05-06 18:06:39

seth wrote:

then post one anyway

Please post your complete system journal for the boot:

sudo journalctl -b | curl -s -H "Accept: application/json, */*" --upload-file - 'https://paste.c-net.org/'

Maybe something obvious shows up.

Next stop would be https://wiki.archlinux.org/title/Kdump

xerxes_ · 2026-05-06 18:13:42

Run affected kernel(s) with boot kernel parameter 'loglevel=7' and after you login but before you connect external monitor, run command '(sudo) journalctl -f' so system messages will follow at realtime on screen and then connect external monitor and see if some useful messages show up... and if so, post here text or pic.

bitwanderer · 2026-05-06 20:20:09

System journal for one boot:
https://paste.c-net.org/SuckersAccuracy

I'll try Kdump and i'll let you know.

seth · 2026-05-06 21:01:40

6.18.0-arch1-1, so ends in

mag 06 18:19:47 bellatrix systemd[1]: Starting User Database Manager...
mag 06 18:19:47 bellatrix systemd-journald[604]: Time spent on flushing to /var/log/journal/ba148fbbe7664660875fa531b78c90d1 is 20.270ms for 1089 entries.

just ends at the root switch by

between 6.16.arch1-1 and 6.18.13.arch1-1 the problem is triggered immediately after login even without plugging the HDMI

What exactly is actually happening here? If you only boot the multi-user.target you're presented w/ the agetty login, you can enter your credentials but at that point things go south?
Or are you booting some DM (eg. sddm) login there (into what) and the screen turns off? Do you already have remote connection at this point or might we be looking at only superficially similar but ultimately different problems?

You'll also find a bunch of bisection kernels in https://pkgbuild.com//~gromit/linux-bisection-kernels/ - look at 6.15.r[0-9]* (not the ".rc.r[0-9]*" ones)

bitwanderer · 2026-05-06 21:46:47

That boot was graphical.target but i tried also multi-user in other boots with newer kernels. In that boot i typed the password in gdm and the screen became black (i see the backlight so it should be on but black as always). I think that it's the same problem but i'm not 100% sure.

Last edited by bitwanderer (2026-05-06 22:24:02)

seth · 2026-05-07 07:34:27

You can use GDM, so the problem there will be w/ the session process/script or maybe some user service - and the journal cut short because your finger eagerly reached for the power button
Try the behavior on the multi-user.target only to mitigate the impact of any userspace session and also test the behavior w/ a fresh user.

bitwanderer · 2026-05-07 08:15:48

Now i tried multi-user.target with kernel 6.18.0, everything was ok until i plugged in the HDMI cable, so with multi-user.target the behaviour is the same with kernels 6.19.5 and later, the journal:

https://paste.c-net.org/FreakingFoley

I'll try Kdump also.

bitwanderer · 2026-05-07 10:40:27

I tried Kdump with kernel 6.12lts triggering crash with sysrq and it worked, then i tried with kernel 6.18.0 multi-user.target but when i plugged the HDMI cable the crash kernel didn't boot.

seth · 2026-05-07 13:42:06

Recap:
* Plugging the HDMI cable at the multi-user.target halts the kernel
* no output on the console (eg. in a running "dmesg -w")?
* sysrq + reisub doesn't work
* no crash is being triggered (nor can be triggered) at this point
* 6.15.x is unaffected (so unlikely electrical)

Does 6.16.arch1-1 behave like 6.18 itr?
I assume there's something on the other end of the cable - what happens if you just plug the cable (no monitor connected)?
Do you have another monitor you could test?

bitwanderer · 2026-05-07 17:11:30

The problem starts with the first 6.16.x, i tried also 6.15.rcx and 6.16.rcx and i can confirm this. I tried with the cable with nothing at the other end and all was fine, then i connected a monitor of another brand and the same problem happened, this time the screen wasn't black but there was a freeze of the image and a blue stripe appeared at the top, this was the only difference.

Last edited by bitwanderer (2026-05-07 17:13:10)

seth · 2026-05-07 19:44:20

the first 6.16.x, i tried also 6.15.rcx and 6.16.rcx

https://github.com/gregkh/linux/commits … u/drm/i915
It's *not* in 6.16-rc1 ?

bitwanderer · 2026-05-08 09:42:55

The problem is also in 6.16.rc1

seth · 2026-05-08 20:53:07

Blast - that would have made a short list
Did you test any of the bisection kernels?

seth wrote:

You'll also find a bunch of bisection kernels in https://pkgbuild.com//~gromit/linux-bisection-kernels/ - look at 6.15.r[0-9]* (not the ".rc.r[0-9]*" ones)

For some wild shot, try to throw "intel_idle.max_cstate=1 i915.enable_dc=0 ahci.mobile_lpm_policy=1 i915.enable_ips=0 i915.enable_dp_mst=0" at the https://wiki.archlinux.org/title/Kernel_parameters

bitwanderer · 2026-05-09 10:37:37

seth wrote:

For some wild shot, try to throw "intel_idle.max_cstate=1 i915.enable_dc=0 ahci.mobile_lpm_policy=1 i915.enable_ips=0 i915.enable_dp_mst=0" at the https://wiki.archlinux.org/title/Kernel_parameters

These parameters had no effect on the problem.

seth wrote:

Did you test any of the bisection kernels?

I tried bisection kernels and the problem starts with 6.16 kernels

loqs · 2026-05-09 11:47:18

Have you tried the first bisection point between 6.15 and 6.16 https://pkgbuild.com/\~gromit/linux-bis … kg.tar.zst

bitwanderer · 2026-05-11 09:39:37

loqs wrote:

Have you tried the first bisection point between 6.15 and 6.16 https://pkgbuild.com/\~gromit/linux-bis … kg.tar.zst

Yes, and it's affected by the problem.

seth · 2026-05-11 15:25:45

https://github.com/gregkh/linux/commits … u/drm/i915
https://github.com/gregkh/linux/commits … u/drm/i915

"i915.enable_dp_mst=0 i915.enable_psr=0", but we already tested i915.enable_dp_mst=0 - PSR??

Then there're
https://github.com/gregkh/linux/commit/ … e0aee5460e
https://github.com/gregkh/linux/commit/ … 89761e0e81
https://github.com/gregkh/linux/commit/ … 4511c151e4

Or the bug isn't in i915 at all (kinda pity that you can't test the xe driver )

bitwanderer · 2026-05-11 15:41:04

seth wrote:

"i915.enable_dp_mst=0 i915.enable_psr=0", but we already tested i915.enable_dp_mst=0 - PSR??

PSR doesn't work

loqs · 2026-05-11 16:08:53

$ git bisect bad
Bisecting: 4089 revisions left to test after this (roughly 12 steps)
[a61e26038143727d9b0f1bc01b0370f77f2ad7e4] Merge tag 'media/v6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
$ git describe 
v6.15-3960-ga61e26038143

https://pkgbuild.com/\~gromit/linux-bis … kg.tar.zst

Last edited by loqs (2026-05-11 16:09:17)

bitwanderer · 2026-05-12 06:44:01

loqs wrote:

https://pkgbuild.com/\~gromit/linux-bis … kg.tar.zst

This version works.

loqs · 2026-05-12 14:36:39

$ git bisect good
Bisecting: 2195 revisions left to test after this (roughly 11 steps)
[47cf96fbe393839b125a9b694a8cfdd3f4216baa] Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
$ git describe 
v6.15-5854-g47cf96fbe393

https://pkgbuild.com/\~gromit/linux-bis … kg.tar.zst

bitwanderer · 2026-05-12 16:00:50

loqs wrote:

https://pkgbuild.com/\~gromit/linux-bis … kg.tar.zst

This version doesn't work

Last edited by bitwanderer (2026-05-12 16:01:19)

Arch Linux

#1 2026-05-06 10:35:55

[SOLVED] PC immediately hangs after login on kernel 6.16 and later

#2 2026-05-06 12:08:19

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#3 2026-05-06 16:43:22

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#4 2026-05-06 18:06:39

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#5 2026-05-06 18:13:42

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#6 2026-05-06 20:20:09

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#7 2026-05-06 21:01:40

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#8 2026-05-06 21:46:47

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#9 2026-05-07 07:34:27

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#10 2026-05-07 08:15:48

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#11 2026-05-07 10:40:27

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#12 2026-05-07 13:42:06

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#13 2026-05-07 17:11:30

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#14 2026-05-07 19:44:20

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#15 2026-05-08 09:42:55

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#16 2026-05-08 20:53:07

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#17 2026-05-09 10:37:37

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#18 2026-05-09 11:47:18

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#19 2026-05-11 09:39:37

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#20 2026-05-11 15:25:45

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#21 2026-05-11 15:41:04

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#22 2026-05-11 16:08:53

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#23 2026-05-12 06:44:01

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#24 2026-05-12 14:36:39

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

#25 2026-05-12 16:00:50

Re: [SOLVED] PC immediately hangs after login on kernel 6.16 and later

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