Hi all, I am seeing a similar stack trace from Xorg with a dummy video driver. This is the configuration used by chrome-remote-desktop, which stopped working after the latest update. Here is the stack trace: (EE) (EE) Backtrace: (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x139) [0x55c6ad57fc59] (EE) 1: /lib/x86_64-linux-gnu/libc.so.6 (__sigaction+0x40) [0x7f260965af90] (EE) unw_get_proc_name failed: no unwind info found [-10] (EE) 2: /lib64/ld-linux-x86-64.so.2 (?+0x0) [0x7f260a20f029] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (_dl_catch_exception+0x7a) [0x7f260976de9a] (EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (_dl_catch_error+0x2f) [0x7f260976df4f] (EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (dlerror+0x297) [0x7f26096a3dc7] (EE) 6: /lib/x86_64-linux-gnu/libc.so.6 (dlclose+0x36) [0x7f26096a3b26] (EE) 7: /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so (nouveau_drm_screen_create+0x1d50f4) [0x7f25c7ee7f44] (EE) 8: /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so (nouveau_drm_screen_create+0x1d4340) [0x7f25c7ee7190] (EE) unw_get_proc_name failed: no unwind info found [-10] (EE) 9: /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so (?+0x0) [0x7f25c74aa179] (EE) 10: /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so (__driDriverGetExtensions_d3d12+0x60ae16) [0x7f25c7ab5156] (EE) 11: /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so (__driDriverGetExtensions_d3d12+0x60ad84) [0x7f25c7ab50c4] (EE) 12: /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so (__driDriverGetExtensions_d3d12+0x6f4) [0x7f25c74aaa34] (EE) 13: /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so (__driDriverGetExtensions_d3d12+0xa175) [0x7f25c74b44b5] (EE) unw_get_proc_name failed: no unwind info found [-10] (EE) 14: /usr/lib/xorg/modules/extensions/libglx.so (?+0x0) [0x7f26092e7d77] (EE) unw_get_proc_name failed: no unwind info found [-10] (EE) 15: /usr/lib/xorg/modules/extensions/libglx.so (?+0x0) [0x7f26092e6b7f] (EE) 16: /usr/lib/xorg/Xorg (_CallCallbacks+0x34) [0x55c6ad411a24] (EE) 17: /usr/lib/xorg/Xorg (dri3_send_open_reply+0x10af) [0x55c6ad53da9f] (EE) 18: /usr/lib/xorg/Xorg (InitExtensions+0x89) [0x55c6ad47d2a9] (EE) 19: /usr/lib/xorg/Xorg (InitFonts+0x1e8) [0x55c6ad4104e8] (EE) 20: /lib/x86_64-linux-gnu/libc.so.6 (__libc_init_first+0x8a) [0x7f260964618a] (EE) 21: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0x85) [0x7f2609646245] (EE) 22: /usr/lib/xorg/Xorg (_start+0x21) [0x55c6ad3f9b61] (EE) (EE) Segmentation fault at address 0x337 (EE) Fatal server error: (EE) Caught signal 11 (Segmentation fault). Server aborting (EE) To reproduce, this is the minimal command (after installing xserver-xorg-video-dummy): $ /usr/lib/xorg/Xorg :20 -config xorg.conf The config is attached. Also, I think this bug is a duplicate: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1025326 Hope it helps finding the issue. Thanks, -- Radu
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