Arch Linux

adrin

Member

Registered: 2017-08-05

Posts: 15

External monitor goes blank when trying highest resolution on amdgpu

Short version is: things used to work, and since a few days ago the external monitor goes blank if I try to set the highest resolution (2560x1440).

I installed `xf86-video-amdgpu` and updated other packages, and it triggered the issue. Since then, I've uninstalled, removed the `amdgpu` from `mkinitcpio.conf` "modules", and back, but no help there.

Sometimes the external monitor doesn't come on at all (unless I go to tty4 for instance), but if I disconnect / reconnect the hub (monitor connected to that since laptop doesn't have HDMI) it comes back on when using 1920x1080 resolution.

I've tried going through quite a few existing posts which seem similar for 2 days now, but haven't figured how to fix the issue yet.

Some info which might be useful:

# inxi -Gx
Graphics:
  Device-1: AMD Navi 24 [Radeon RX 6400/6500 XT/6500M] vendor: Lenovo
    driver: amdgpu v: kernel arch: RDNA-2 bus-ID: 03:00.0
  Device-2: AMD Phoenix1 vendor: Lenovo driver: amdgpu v: kernel
    arch: RDNA-3 bus-ID: c7:00.0 temp: 43.0 C
  Device-3: Chicony Integrated Camera driver: uvcvideo type: USB
    bus-ID: 3-1:2
  Display: x11 server: X.org v: 1.21.1.13 with: Xwayland v: 24.1.2 driver:
    X: loaded: amdgpu unloaded: modesetting dri: radeonsi gpu: amdgpu
    resolution: <missing: xdpyinfo/xrandr> resolution: 1: 2560x1440
    2: 1920x1200
  API: EGL v: 1.5 drivers: radeonsi,swrast platforms:
    active: gbm,x11,surfaceless,device inactive: wayland,device-0
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 24.1.5-arch1.1
    glx-v: 1.4 direct-render: yes renderer: AMD Radeon 780M (radeonsi
    gfx1103_r1 LLVM 18.1.8 DRM 3.57 6.10.3-arch1-2)

My `journalctl -b` output: https://termbin.com/pt8y

`dmesg` output: https://termbin.com/2zxa

`mkinitcpio.conf`: https://termbin.com/q0e8

`lspci`:

# lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14e8
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Device 14e9
00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14ea
00:01.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14ed
00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14ea
00:02.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14ee
00:02.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14ee
00:02.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14ee
00:03.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14ea
00:03.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 19h USB4/Thunderbolt PCIe tunnel
00:04.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14ea
00:04.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 19h USB4/Thunderbolt PCIe tunnel
00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14ea
00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14eb
00:08.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14eb
00:08.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14eb
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 71)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f5
00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f6
00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f7
01:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Upstream Port of PCI Express Switch (rev d3)
02:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Downstream Port of PCI Express Switch
03:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 24 [Radeon RX 6400/6500 XT/6500M] (rev d3)
04:00.0 Network controller: MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter
05:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)
06:00.0 Non-Volatile memory controller: KIOXIA Corporation NVMe SSD Controller XG8 (rev 01)
c7:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Phoenix1 (rev d9)
c7:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt Radeon High Definition Audio Controller
c7:00.2 Encryption controller: Advanced Micro Devices, Inc. [AMD] Family 19h (Model 74h) CCP/PSP 3.0 Device
c7:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15b9
c7:00.4 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15ba
c7:00.5 Multimedia controller: Advanced Micro Devices, Inc. [AMD] ACP/ACP3X/ACP6x Audio Coprocessor (rev 63)
c7:00.6 Audio device: Advanced Micro Devices, Inc. [AMD] Family 17h/19h HD Audio Controller
c8:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device 14ec
c8:00.1 Signal processing controller: Advanced Micro Devices, Inc. [AMD] AMD IPU Device
c9:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device 14ec
c9:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15c0
c9:00.4 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15c1
c9:00.5 USB controller: Advanced Micro Devices, Inc. [AMD] Pink Sardine USB4/Thunderbolt NHI controller #1
c9:00.6 USB controller: Advanced Micro Devices, Inc. [AMD] Pink Sardine USB4/Thunderbolt NHI controller #2

I'm not sure, for instance, if this is related: https://bbs.archlinux.org/viewtopic.php … 8#p2109318

I've tried changing thunderbolt/usb4 and HDMI cables in case those were the issue, but no change.

I understand this might not be enough information, but appreciate any help and very happy to provide whatever other info needed here

Last edited by adrin (2024-08-09 15:53:32)

adrin

Member

Registered: 2017-08-05

Posts: 15

Re: External monitor goes blank when trying highest resolution on amdgpu

So upon more investigation, I switched my "Thinkpad Thunderbolt 4 Workstation Dock" with a small, simpler "Lenovo Powered USB-C Travel Hub", and connecting the monitor to its HDMI gives me the right resolution.

I'd appreciate hints to how I could further diagnose the issue. I don't have another monitor to try things with.