<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - X crashes when re-docking after undock (to_sna_output failed assert)" href="https://bugs.freedesktop.org/show_bug.cgi?id=99432#c1">Comment # 1</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - X crashes when re-docking after undock (to_sna_output failed assert)" href="https://bugs.freedesktop.org/show_bug.cgi?id=99432">bug 99432</a> from <a class="email" href="mailto:wilderkde@gmail.com" title="Jacopo De Simoi <wilderkde@gmail.com>"> Jacopo De Simoi</a> <pre>I have a ThinkPad T460s (Skylake). After undocking from an UltraDock with DP MST hub), docking one more time causes a failed assert; Please let me know if I should enable further debug options. [ 245.560] (EE) [ 245.560] (EE) Backtrace: [ 245.560] (EE) 0: /usr/bin/X (xorg_backtrace+0x56) [0x58ade6] [ 245.560] (EE) 1: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f6f56438000+0x9c012) [0x7f6f564d4012] [ 245.560] (EE) 2: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f6f56438000+0xa0e2b) [0x7f6f564d8e2b] [ 245.560] (EE) 3: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f6f56438000+0xaa4ad) [0x7f6f564e24ad] [ 245.561] (EE) 4: /usr/bin/X (xf86Wakeup+0x1aa) [0x4764ca] [ 245.561] (EE) 5: /usr/bin/X (WakeupHandler+0x6b) [0x43a36b] [ 245.561] (EE) 6: /usr/bin/X (WaitForSomething+0x1dd) [0x587c5d] [ 245.561] (EE) 7: /usr/bin/X (0x400000+0x3557e) [0x43557e] [ 245.561] (EE) 8: /usr/bin/X (0x400000+0x397b3) [0x4397b3] [ 245.561] (EE) 9: /lib64/libc.so.6 (__libc_start_main+0xf0) [0x7f6f5a6a4790] [ 245.561] (EE) 10: /usr/bin/X (_start+0x29) [0x423aa9] [ 245.561] (EE) [ 245.561] (EE) Fatal server error: [ 245.561] (EE) sna_output_add:5098 assertion 'to_sna_output(output)->id == 0' failed [ 245.561] (EE) [ 245.562] (EE) Please consult the The X.Org Foundation support at <a href="http://wiki.x.org">http://wiki.x.org</a> for help. [ 245.562] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. [ 245.562] (EE) [ 245.562] (II) AIGLX: Suspending AIGLX clients for VT switch [ 246.282] (EE) Server terminated with error (1). Closing log file.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>