Bug#900550: xserver-xorg-core: X server segfaults for xfce4+nouveau after 2:1.19.6-1 -> 2:1.20.0-2 upgrade
On 2018-06-01 10:10 AM, Agustin Martin Domingo wrote:
> Package: xserver-xorg-core
> Version: 2:1.20.0-2
> Severity: important
>
> Dear Maintainer,
>
> After 2:1.19.6-1 -> 2:1.20.0-2 xfce4-session+nouveau segfaults on startup
> and cannot start sesion. Trying to start it manually with startxfce4
> fails giving
>
>
> (EE)
> (EE) Backtrace:
> (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4d) [0x555e574106fd]
> (EE) 1: /usr/lib/xorg/Xorg (0x555e5725d000+0x1b73b9) [0x555e574143b9]
> (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fc78ff70000+0x11f50) [0x7fc78ff81f50]
> (EE) 3: /usr/lib/xorg/Xorg (miRenderColorToPixel+0xe) [0x555e57384a9e]
> (EE) 4: /usr/lib/xorg/modules/libexa.so (0x7fc78c9e0000+0xf12b) [0x7fc78c9ef12b]
> (EE) 5: /usr/lib/xorg/Xorg (0x555e5725d000+0x13a786) [0x555e57397786]
> (EE) 6: /usr/lib/xorg/Xorg (0x555e5725d000+0x12eaec) [0x555e5738baec]
> (EE) 7: /usr/lib/xorg/Xorg (0x555e5725d000+0x5b008) [0x555e572b8008]
> (EE) 8: /usr/lib/xorg/Xorg (0x555e5725d000+0x5f008) [0x555e572bc008]
> (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xe7) [0x7fc78fbd1a87]
> (EE) 10: /usr/lib/xorg/Xorg (_start+0x2a) [0x555e572a5d0a]
> (EE)
> (EE) Segmentation fault at address 0x8
> (EE)
> Fatal server error:
> (EE) Caught signal 11 (Segmentation fault). Server aborting
> (EE)
> (EE)
> Please consult the The X.Org Foundation support
> at http://wiki.x.org
> for help.
> (EE) Please also check the log file at "/var/log/Xorg.2.log" for additional information.
> (EE)
> (II) AIGLX: Suspending AIGLX clients for VT switch
> (EE) Server terminated with error (1). Closing log file.
>
>
> No problem with icewm and probably other windows managers.
>
> I have googled a bit about this problem and found a recent message in
> debian-user about this very same problem,
>
> [upgrade to X 1.20.0 broken]
> https://lists.debian.org/debian-user/2018/05/msg01008.html
>
> Problem has been confirmed by some people in that thread and it is suggested
> to be triggered by the Xfce compositor
>
> https://lists.debian.org/debian-user/2018/05/msg01035.html
>
> As a matter of fact, if I disable the compositor, problem goes away.
>
> I am filing this bug report against xserver-xorg-core because in other
> reference about this problem in slackware,
>
> https://www.linuxquestions.org/questions/slackware-14/slackware-current-xorg-server-1-20-0-with-xf86-video-nouveau-segfaults-4175629581/
>
> they suggests that it may be the real cause, with a a fatal interaction
> between the "compositor" option of xfwm4 and xorg-server-1.20.0. It is also
> noted that this may be a problem not only with the nouveau driver, but also
> with radeon driver, both with xfce4.
It would happen with anything using EXA.
https://patchwork.freedesktop.org/patch/226573/ fixes it.
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
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