Arch Linux

DrMaex

Member

Registered: 2021-12-01

Posts: 19

(SOLVED) Need help on repairing Xorg after Systemupdate (AMDGPU)

Hello,
Some days ago I suddenly couldnt boot into my KDE anymore.
The PC just hangs on boot and I need to switch to the terminal with ALT+F3

I tried several things but now i am running out of ideas. But i still have full access to the system
Unfortunately i get the error url not specified when I try to run

sudo lspci -k | curl -F 'f:1=<-' ix.io

but i can ping ix.io... (any ideas??)

I am writing this post from my laptop (where the command is working...) this all the output is manually typed...
My graphics card

01:00.0 VGA Compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti XT [Radeon HD 7979/8970 OEM / R9 280X]
              Subsystem: ASUSTeK Computer Inc. Tahti XT2 [Matrix HD 7970 Platinum]
              Kernel Modules: radeon, amdgpu

Reinstalling amdgpu and xorg with previously running "pacman -Rdd xorg" did not help.
Deleting all video related configs in "/usr/share/X11/xorg.conf.d" also did not help
Creating a new config with "Xorg :0 -configure" also did not help. (I tried also to remove all the setting which does not seem to be essential to me, like second monitor and so on)
When I boot and then cancel the hanging state with ALT+F3 i dont see any fresh Xorg.0.log in /var/log, it only gets created after I force it with "sudo startx"

Here i see that something went wrong but i dont know how to deal with it

(II) AMDGPU(0): [KMS] Kernel modesetting enabled
(EE) AMDGPU(0): [drm] Failed to open DRM device for pci:0000:01:00:1: no such file or directory
(EE) Screen 0 deleted because of no matching config section
..
(EE) Device(s) detected , but none match those in the config file
..
(EE) no Screens found(EE)

When I remove radon.si_support=0 amdgpu.si_support=1 like suggested in Archwiki-AMDGPU when one has Southern Islands (SI) card
I see messages  about incompatible DRM version

and in the log i see folloging lines

(EE) AMDGPU(0): amdgpu_device_initialize_failed
(II) AMDGPU(1): [KMS] Kernel modesetting enabled
(EE) AMDGPU(1): [drm] device is not DRM master
(EE) Screen 0 deleted because of no matching config section
...
..
..
(EE) Device(s) detected , but none match those in the config file

I would appreciate any suggestions what else I could do before reinstalling the whole system...(that would be my least preferred solution)

p.s the card is working as expected when i try dualboot into windows on another harddrive so there are no hardware defects

Last edited by DrMaex (2022-01-15 11:23:50)

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 13,285

Re: (SOLVED) Need help on repairing Xorg after Systemupdate (AMDGPU)

01:00.0 VGA Compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti XT [Radeon HD 7979/8970 OEM / R9 280X]

There's a bug in kernel 5.16 for that card that prevents it from working .

read https://bbs.archlinux.org/viewtopic.php?id=273100 for options

If you want to follow upstream progress on this, https://gitlab.freedesktop.org/drm/amd/-/issues/1860

---

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky

DrMaex

Member

Registered: 2021-12-01

Posts: 19

Re: (SOLVED) Need help on repairing Xorg after Systemupdate (AMDGPU)

Oh wow, thank you very much. So basically when i understand it right its a bug and not a feature and i just need to wait until some of the next kernel releases and it should start working again? i can afford waiting as i dont want to recompile things or make a downgrade.

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 13,285

Re: (SOLVED) Need help on repairing Xorg after Systemupdate (AMDGPU)

The linux-lts kernel package was just switched from 5.10 to 5.15 and coexists fine with the linux package .

Install linux-lts and configure your bootloader to allow you to choose between linux-lts and linux at boottime.
Then you don't need to downgrade anything and will keep an uptodate system.

---

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky

DrMaex

Member

Registered: 2021-12-01

Posts: 19

Re: (SOLVED) Need help on repairing Xorg after Systemupdate (AMDGPU)

The linux-lts kernel package was just switched from 5.10 to 5.15 and coexists fine with the linux package .

Install linux-lts and configure your bootloader to allow you to choose between linux-lts and linux at boottime.
Then you don't need to downgrade anything and will keep an uptodate system.

Actually quite good idea after such experience. thank you. I became very careless running "pacman -Syu" because it just works all the time and usually all problems had my own handling as the root cause. but this time its different.