Xfce Forum

joeu

Member

Registered: 2023-03-24

Posts: 2

xfce display settings rotation change causes X to segfault

Hi, I've been fighting with this issue for about a week now, and haven't found a solution on the Net.
The root cause could be the driver or even Xorg, but the error starts with XFCE, so that's where I'm starting my troubleshooting.

Software & versions
    XFCE ver 4.16
    Alpine Linux  5.15.98-0-lts  x86_64
    Kernel command line: root=/dev/vg0/lv_root modules=sd-mod,usb-storage,ext4,nvme quiet rootfstype=ext4 initrd=\initramfs-lts

    X.Org X Server 1.21.1.7
    RADEON: Driver for ATI/AMD Radeon chipsets: AMD Radeon HD 6800 Series
    package is xf86-video-ati-19.1.0-r2 x86_64 {xf86-video-ati}
    CPU/APU is AMD A10-5800K

Suspicous errors in the Xorg.0.log
    When I compare the log file for a good start with a failed start, the difference is these messages:

    [    50.458] (EE) RADEON(0): drmmode_do_crtc_dpms cannot get last vblank counter
    [    50.499] (EE) Segmentation fault at address 0x0
    [    50.499] (EE) Caught signal 11 (Segmentation fault). Server aborting
    [    50.499] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
    [    50.743] (EE) Server terminated with error (1). Closing log file.

What's Happening ?
    I am using two monitors
    I can boot into Alpine and the XFCE desktop starts automatically
    I use the XFCE display settings app ( applet ? ) to change the rotation of the secondary monitor
    XFCE tries to restart, and it looks like it tries 3 times or so before quitting. Each time it looks like the video card is being reset.

    I can get XFCE to start again by disconnecting the DVI cable on the secondary monitor

Any thoughts ? or steps I can try.
I can post full logs if that will help

Thanks

- Joe.

Last edited by joeu (2023-03-24 01:44:11)

bigbadaboum

Member

Registered: 2022-12-22

Posts: 19

Re: xfce display settings rotation change causes X to segfault

Hello,

Try to use AMD Catalyst Driver or the new xf86-video-amdgpu-23.0.0     2023-02-22 https://www.x.org/releases/individual/d … 0.0.tar.xz

joeu

Member

Registered: 2023-03-24

Posts: 2

Re: xfce display settings rotation change causes X to segfault

Hi,

The man(4) page for amdgpu states that it supports SI and later. My GPU is the earler Terrascale 3 architecture.

Do you have a reason to believe amdgpu will solve the issue, or is this just to rule out the Radeon/Ati driver ?
If that's the objective, could I just uninstall the radeon driver, and let it fall back to fbdev ?

bigbadaboum

Member

Registered: 2022-12-22

Posts: 19

Re: xfce display settings rotation change causes X to segfault

Hello,

To be sure to identify the cause of the problem, you can do a test with a live cd that uses xorg-server-1.20.6 and xf86-video-ati-19.1.0, xf86-video-ati has not been updated for later versions of xorg.