Bug#814982: [xwayland] Reproducible segmentation fault when pluggin new screen
On Wed, Feb 17, 2016 at 11:33:56AM +0100, Anthony Callegaro wrote:
> Package: xwayland
> Version: 2:1.18.1-1
> Severity: important
>
> --- Please enter the report below this line. ---
>
> Hello dear maintainer,
>
> I have been using sid as my main OS since 2001 and over the last couple
> of years there has been so few breakage that I didn't even notice that
> gnome-session switched to XWayland :) Great work !
>
> I have been experiencing some segmentation faults lately that I thought
> were due to Xorg which seems actually linked to the recent upgrade to
> XWayland 1.18.1-1.
>
> When plugging a HDMI screen I get the following segmentation fault :
>
> (EE) Backtrace:
> (EE) 0: /usr/bin/Xwayland (xorg_backtrace+0x4e) [0x55cbedb20b0e]
> (EE) 1: /usr/bin/Xwayland (0x55cbed986000+0x19ee99) [0x55cbedb24e99]
> (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7fa3c5e83000+0x33590)
> [0x7fa3c5eb6590]
> (EE) 3: /usr/bin/Xwayland (MakeAtom+0x30) [0x55cbedad92f0]
> (EE) 4: /usr/bin/Xwayland (0x55cbed986000+0xe7cd8) [0x55cbeda6dcd8]
> (EE) 5: /usr/bin/Xwayland (0x55cbed986000+0xe8739) [0x55cbeda6e739]
> (EE) 6: /usr/bin/Xwayland (0x55cbed986000+0xe8d5b) [0x55cbeda6ed5b]
> (EE) 7: /usr/bin/Xwayland (0x55cbed986000+0x164dcf) [0x55cbedaeadcf]
> (EE) 8: /usr/bin/Xwayland (0x55cbed986000+0x168de3) [0x55cbedaeede3]
> (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0)
> [0x7fa3c5ea3870]
> (EE) 10: /usr/bin/Xwayland (_start+0x29) [0x55cbed9bf019]
> (EE)
> (EE) Segmentation fault at address 0x20
> (EE)
> Fatal server error:
> (EE) Caught signal 11 (Segmentation fault). Server aborting
>
> I installed libwayland-server0-dbg but it doesn't seems to yield more
> information in the backtrace.
>
> (see attached syslog for full event log there doesn't seems to be more
> info in journalctl)
>
> This is always reproducible by either plugging/unplugging the cable or
> hitting the Super+P shortcut to switch through xrandr possibilities.
This could be related / the fix:
https://cgit.freedesktop.org/xorg/xserver/commit/?id=2116f03be04240e961649ca750a7aa5438b8446c
It talks about removal of crtcs only, but maybe that also happens during
discovery of new outputs.
--
Debian Developer - deb.li/jak | jak-linux.org - free software dev
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