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So, I use for daily tasks, the lts kernel version. However these newer kernels (>=5.x) are having bugs with bluetooth, so I decided to downgrade to a old one.
I installed the linux and linux-headers packages and get from Arch rollback machine the version 4.20.8 for kernel and headers. I downgraded successfully, generated grub config again, but when I try to boot with this old kernel (also I tested older and newer ones) I receive this error:
[ 0.243925] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 0.243949] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.15.5-1-ARCH #1
[ 0.243987] Call Trace:
[ 0.243998] dump_stack+0x5c/0x85
[ 0.244009] panic_0xe4/0x252
[ 0.244020] mount_block_root+0x27f/0x2e0
[ 0.244033] ? set_debug_rodata+0x11/0x11
[ 0.244044] prepare_namespace+0x130/0x166
[ 0.244056] kernel_init_freable+0x1e6/0x1f3
[ 0.244068] ? reset_init+0xd0/0xd0
[ 0.244078] kernet_init+0xa/0x100
[ 0.244088] ret_from_fork+0x35/0x40
[ 0.244113] Kernel Offset: 0xd000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[ 0.244139] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)The problem here is: when I try to boot with the latest linux kernel and headers, all works fine...
I tried to regenerate initramfs, wipe boot partition and reinstall grub and also tried to config grub manually with the "c" option on the bootloader screen...
lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 223.6G 0 disk
├─sda1 8:1 0 512M 0 part /boot
├─sda2 8:2 0 40G 0 part /
└─sda3 8:3 0 128G 0 part /homefstab, even though it "doesn't matter" on this part
# Static information about the filesystems.
# See fstab(5) for details.
# <file system> <dir> <type> <options> <dump> <pass>
# /dev/sda2
UUID=792ee5d6-1c6d-40f5-b284-2a4b98686154 / ext4 rw,relatime 0 1
# /dev/sda1
UUID=CF25-F9E4 /boot vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro 0 2
# /dev/sda3
UUID=96a3ab2f-9443-41ac-a4f3-6389c5e8f988 /home ext4 rw,relatime 0 2
/swapfile none swap default 0 0
# /dev/sda2
UUID=792ee5d6-1c6d-40f5-b284-2a4b98686154 / ext4 rw,relatime 0 1lshw
mdsp
description: Notebook
product: Aspire E5-573 (Aspire E5-573_098A_1_37)
vendor: Acer
version: V3.72
serial: NXG5TAL0085418D08A9501
width: 64 bits
capabilities: smbios-2.8 dmi-2.8 smp vsyscall32
configuration: chassis=notebook family=BDW sku=Aspire E5-573_098A_1_37 uuid=610F7312-67AF-11E5-AD89-1C3947527EC7
*-core
description: Motherboard
product: ZORO_BH
vendor: Acer
physical id: 0
version: Type2 - A01 Board Version
serial: NBVB011002542001689501
slot: Type2 - Board Chassis Location
*-firmware
description: BIOS
vendor: Insyde Corp.
physical id: 0
version: V1.37
date: 02/16/2016
size: 128KiB
capacity: 4608KiB
capabilities: pci upgrade shadowing cdboot bootselect edd int13floppynec int13floppytoshiba int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int9keyboard int10video acpi usb biosbootspecification uefi
*-cpu
description: CPU
product: Intel(R) Core(TM) i3-5015U CPU @ 2.10GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: Intel(R) Core(TM) i3-5015U CPU @ 2.10GHz
serial: To Be Filled By O.E.M.
slot: U3E1
size: 1400MHz
capacity: 2100MHz
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 arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap intel_pt xsaveopt dtherm arat pln pts cpufreq
configuration: cores=2 enabledcores=2 threads=4
*-cache:0
description: L1 cache
physical id: 8
slot: L1 Cache
size: 32KiB
capacity: 32KiB
capabilities: synchronous internal write-back instruction
configuration: level=1
*-cache:1
description: L2 cache
physical id: 9
slot: L2 Cache
size: 256KiB
capacity: 256KiB
capabilities: synchronous internal write-back unified
configuration: level=2
*-cache:2
description: L3 cache
physical id: a
slot: L3 Cache
size: 3MiB
capacity: 3MiB
capabilities: synchronous internal write-back unified
configuration: level=3
*-cache
description: L1 cache
physical id: 7
slot: L1 Cache
size: 32KiB
capacity: 32KiB
capabilities: synchronous internal write-back data
configuration: level=1
*-memory
description: System Memory
physical id: 10
slot: System board or motherboard
size: 8GiB
*-bank:0
description: SODIMM DDR3 Synchronous 1600 MHz (0.6 ns)
product: TMT451S6BFR8A-PBHJ
vendor: Hitachi
physical id: 0
serial: 00831618
slot: ChannelA-DIMM0
size: 4GiB
width: 64 bits
clock: 1600MHz (0.6ns)
*-bank:1
description: SODIMM DDR3 Synchronous 1600 MHz (0.6 ns)
product: 99U5469-045.A00LF
vendor: Kingston
physical id: 1
serial: 75134250
slot: ChannelB-DIMM0
size: 4GiB
width: 64 bits
clock: 1600MHz (0.6ns)
*-pci
description: Host bridge
product: Broadwell-U Host Bridge -OPI
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 09
width: 32 bits
clock: 33MHz
configuration: driver=bdw_uncore
resources: irq:0
*-display
description: VGA compatible controller
product: HD Graphics 5500
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:48 memory:c0000000-c0ffffff memory:b0000000-bfffffff ioport:4000(size=64) memory:c0000-dffff
*-multimedia:0
description: Audio device
product: Broadwell-U Audio Controller
vendor: Intel Corporation
physical id: 3
bus info: pci@0000:00:03.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:51 memory:c1210000-c1213fff
*-usb:0
description: USB controller
product: Wildcat Point-LP USB xHCI Controller
vendor: Intel Corporation
physical id: 14
bus info: pci@0000:00:14.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: pm msi xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:46 memory:c1200000-c120ffff
*-usbhost:0
product: xHCI Host Controller
vendor: Linux 5.10.17-1-lts xhci-hcd
physical id: 0
bus info: usb@2
logical name: usb2
version: 5.10
capabilities: usb-2.00
configuration: driver=hub slots=11 speed=480Mbit/s
*-usb:0
description: Bluetooth wireless interface
product: Qualcomm Atheros Bluetooth
vendor: Lite-On Technology Corp.
physical id: 5
bus info: usb@2:5
version: 0.02
capabilities: bluetooth usb-1.10
configuration: driver=btusb maxpower=100mA speed=12Mbit/s
*-usb:1
description: Video
product: HD WebCam
vendor: NC2141103M5191036ALM05
physical id: 7
bus info: usb@2:7
version: 0.05
capabilities: usb-2.00
configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
*-usb:2
description: MMC Host
product: USB2.0-CRW
vendor: Generic
physical id: 8
bus info: usb@2:8
logical name: mmc0
version: 39.60
serial: 20100201396000000
capabilities: usb-2.00
configuration: driver=rtsx_usb maxpower=500mA speed=480Mbit/s
*-usbhost:1
product: xHCI Host Controller
vendor: Linux 5.10.17-1-lts xhci-hcd
physical id: 1
bus info: usb@3
logical name: usb3
version: 5.10
capabilities: usb-3.00
configuration: driver=hub slots=4 speed=5000Mbit/s
*-communication
description: Communication controller
product: Wildcat Point-LP MEI Controller #1
vendor: Intel Corporation
physical id: 16
bus info: pci@0000:00:16.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=mei_me latency=0
resources: irq:47 memory:c121b000-c121b01f
*-multimedia:1
description: Audio device
product: Wildcat Point-LP High Definition Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=snd_hda_intel latency=64
resources: irq:50 memory:c1214000-c1217fff
*-pci:0
description: PCI bridge
product: Wildcat Point-LP PCI Express Root Port #1
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: e3
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:42 ioport:2000(size=4096) memory:a0100000-a02fffff ioport:a0300000(size=2097152)
*-pci:1
description: PCI bridge
product: Wildcat Point-LP PCI Express Root Port #3
vendor: Intel Corporation
physical id: 1c.2
bus info: pci@0000:00:1c.2
version: e3
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:43 ioport:3000(size=4096) memory:c1100000-c11fffff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: enp2s0
version: 15
serial: 1c:39:47:52:7e:c7
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=5.10.17-1-lts firmware=rtl8168h-2_0.0.2 02/26/15 latency=0 link=no multicast=yes port=MII
resources: irq:18 ioport:3000(size=256) memory:c1104000-c1104fff memory:c1100000-c1103fff
*-pci:2
description: PCI bridge
product: Wildcat Point-LP PCI Express Root Port #4
vendor: Intel Corporation
physical id: 1c.3
bus info: pci@0000:00:1c.3
version: e3
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:44 memory:c1000000-c10fffff
*-network
description: Wireless interface
product: QCA9565 / AR9565 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 01
serial: 5c:c9:d3:5c:9d:b1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=5.10.17-1-lts firmware=N/A ip=192.168.0.106 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:19 memory:c1000000-c107ffff memory:c1080000-c108ffff
*-usb:1
description: USB controller
product: Wildcat Point-LP USB EHCI Controller
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: 03
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=0
resources: irq:23 memory:c1219000-c12193ff
*-usbhost
product: EHCI Host Controller
vendor: Linux 5.10.17-1-lts ehci_hcd
physical id: 1
bus info: usb@1
logical name: usb1
version: 5.10
capabilities: usb-2.00
configuration: driver=hub slots=2 speed=480Mbit/s
*-usb
description: USB hub
product: Integrated Hub
vendor: Intel Corp.
physical id: 1
bus info: usb@1:1
version: 0.03
capabilities: usb-2.00
configuration: driver=hub slots=8 speed=480Mbit/s
*-isa
description: ISA bridge
product: Wildcat Point-LP LPC Controller
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 03
width: 32 bits
clock: 33MHz
capabilities: isa bus_master cap_list
configuration: driver=lpc_ich latency=0
resources: irq:0
*-sata
description: SATA controller
product: Wildcat Point-LP SATA Controller [AHCI Mode]
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
version: 03
width: 32 bits
clock: 66MHz
capabilities: sata msi pm ahci_1.0 bus_master cap_list
configuration: driver=ahci latency=0
resources: irq:45 ioport:4088(size=8) ioport:4094(size=4) ioport:4080(size=8) ioport:4090(size=4) ioport:4060(size=32) memory:c1218000-c12187ff
*-serial
description: SMBus
product: Wildcat Point-LP SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 03
width: 64 bits
clock: 33MHz
configuration: driver=i801_smbus latency=0
resources: irq:18 memory:c121a000-c121a0ff ioport:4040(size=32)
*-pnp00:00
product: Motherboard registers
physical id: 1
capabilities: pnp
configuration: driver=system
*-pnp00:01
product: AT Real-Time Clock
physical id: 2
capabilities: pnp
configuration: driver=rtc_cmos
*-pnp00:02
product: PnP device INT3f0d
vendor: Interphase Corporation
physical id: 3
capabilities: pnp
configuration: driver=system
*-pnp00:03
product: IBM Enhanced keyboard controller (101/2-key)
physical id: 5
capabilities: pnp
configuration: driver=i8042 kbd
*-pnp00:04
product: Motherboard registers
physical id: 6
capabilities: pnp
configuration: driver=system
*-pnp00:05
product: Motherboard registers
physical id: 8
capabilities: pnp
configuration: driver=systemLast edited by mdsp (2021-02-21 07:16:54)
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mkinitcpio was recently changed to use zstd compression by default; the previous default was gzip. The old kernel probably can't read zstd-compressed initramfs, so try changing the compression method in /etc/mkinitcpio.conf to gzip and see if that helps.
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mkinitcpio was recently changed to use zstd compression by default; the previous default was gzip. The old kernel probably can't read zstd-compressed initramfs, so try changing the compression method in /etc/mkinitcpio.conf to gzip and see if that helps.
Wow, I dind't know that! Thank you so much, you saved my bluetooth hahahah!
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