Hi Starting from version 1.19.6 the server is crashing on startup. It was working correctly on 1.19.5. The problem occurs only when composite extension is disabled (Option "Composite" "Disable") in xorg.conf. I bisected the bad commits. There are two of them, which has to be reverted (tested with every single one reverted and it was crashing - so I had to revert both of them). The problematic commits are: 91c42093b248 glx: Duplicate relevant fbconfigs for compositing visuals c64bd21d7a73 glx: Move Composite's synthetic visuals to a different select group The backtrace: [513365.394] (EE) Backtrace: [513365.394] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4a) [0x56062ea8c2ea] [513365.394] (EE) 1: /usr/lib/xorg/Xorg (0x56062e8d3000+0x1bd079) [0x56062ea90079] [513365.394] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7ff6bd2fc000+0x12180) [0x7ff6bd30e180] [513365.394] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (gsignal+0x110) [0x7ff6bcf7a6a0] [513365.394] (EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (abort+0x1c7) [0x7ff6bcf7bcf7] [513365.394] (EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (0x7ff6bcf46000+0x2cfca) [0x7ff6bcf72fca] [513365.394] (EE) 6: /lib/x86_64-linux-gnu/libc.so.6 (0x7ff6bcf46000+0x2d042) [0x7ff6bcf73042] [513365.394] (EE) 7: /usr/lib/xorg/Xorg (0x56062e8d3000+0x3ed60) [0x56062e911d60] [513365.394] (EE) 8: /usr/lib/xorg/Xorg (0x56062e8d3000+0xe3ffd) [0x56062e9b6ffd] [513365.394] (EE) 9: /usr/lib/xorg/modules/extensions/libglx.so (0x7ff6bb301000+0x28a39) [0x7ff6bb329a39] [513365.394] (EE) 10: /usr/lib/xorg/modules/extensions/libglx.so (0x7ff6bb301000+0x2fac4) [0x7ff6bb330ac4] [513365.394] (EE) 11: /usr/lib/xorg/modules/extensions/libglx.so (0x7ff6bb301000+0x274aa) [0x7ff6bb3284aa] [513365.394] (EE) 12: /usr/lib/xorg/Xorg (InitExtensions+0x43) [0x56062e99a8f3] [513365.394] (EE) 13: /usr/lib/xorg/Xorg (0x56062e8d3000+0x585f7) [0x56062e92b5f7] [513365.394] (EE) 14: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xea) [0x7ff6bcf66f2a] [513365.394] (EE) 15: /usr/lib/xorg/Xorg (_start+0x2a) [0x56062e91546a] [513365.394] (EE) [513365.394] (EE) Fatal server error: [513365.394] (EE) Caught signal 6 (Aborted). Server aborting [513365.394] (EE) [513365.394] (EE) Firstly I reported the bug on debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=891287 There you can find additional platform info if necessary. regards!
I think this is a dup of bug 106226 considering that the problem check-in seems to be the same.
Why do you think disabling Composite is a thing you need to do?
Adam, Yeah, composite may be working perfectly fine but on standard configurations, in my case I always have performance problems/flickering/segfaults* when it is enabled. The "problem" here is I am simultaneously using four monitors on two different adapters (and xinerama is a must here) :) * Depending on xorg version and specific time when I was trying to enable it again :) btw: some day I'd like to use wayland but I am still waiting for multi gpu support...
(In reply to Mariusz Białończyk from comment #3) > btw: some day I'd like to use wayland but I am still waiting for multi gpu > support... Current versions of gnome-shell support multiple GPUs in Wayland mode.
I am confirming that this bug is now fixed with Michal Srb's commit: 1326ee0bc5eb858c3c00847: glx: Do not call into Composite if it is disabled. I've marked it as fixed. Thank you!
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