[Mesa-dev] [Bug 98563] Xorg segfaults with displaylink attached and mesa version >= 13.0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98563

--- Comment #17 from David Rosenstrauch <darose at darose.net> ---
(In reply to Emil Velikov from comment #14)
> David the original report/issue (segfaults when using DisplayLink (non-PCI
> devices in general) should be fixed with commit 677cd97dc4a (libdrm 2.4.72).
> 
> Please be specific when you say "seeing this issue". Do attach Xorg.log
> and/or relevant section of dmesg/journalctl.


My apologies - this may not be the exact same bug.  However, since I was seeing
the same stack trace from Xorg (see below) I assumed it was.

Issue I'm having is that when I connect my laptop to my docking station with
external monitor, I receive the same Xorg crash as the other person.  (Intel
driver crashes with the below stack trace.)

I actually don't know if the monitor or the docking station is displaylink or
not.  (Monitor is Samsung u28e590d; dock is Dell e-port replicator.)

However, downgrading from Mesa 13 to 12 does fix the issue.  And the upgrade to
libdrm 2.4.72 didn't fix it.

---

Stack trace:

[  6496.994] (II) intel(0): Enabled output DP1-1
[  6497.010] (II) intel(0): Enabled output DP1-2
[  6497.011] (II) intel(0): Enabled output DP1-3
[  6497.058] (--) intel(0): HDMI max TMDS frequency 300000KHz
[  6497.061] (EE) 
[  6497.061] (EE) Backtrace:
[  6497.061] (EE) 0: /usr/lib/xorg-server/Xorg (OsLookupColor+0x139) [0x59cd49]
[  6497.065] (EE) 1: /usr/lib/libc.so.6 (__restore_rt+0x0) [0x7f2d13c670af]
[  6497.066] (EE) 2: /usr/lib/libc.so.6 (readdir+0x29) [0x7f2d13ce77e9]
[  6497.067] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so (_init+0x63998)
[0x7f2d0f2dd728]
[  6497.068] (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so (_init+0x662b3)
[0x7f2d0f2e3103]
[  6497.069] (EE) 5: /usr/lib/xorg/modules/drivers/intel_drv.so (_init+0x6d985)
[0x7f2d0f2f1fb5]
[  6497.069] (EE) 6: /usr/lib/xorg-server/Xorg (xf86Wakeup+0x197) [0x479697]
[  6497.069] (EE) 7: /usr/lib/xorg-server/Xorg (WakeupHandler+0x6d) [0x43b2dd]
[  6497.070] (EE) 8: /usr/lib/xorg-server/Xorg (WaitForSomething+0x1e9)
[0x5954f9]
[  6497.070] (EE) 9: /usr/lib/xorg-server/Xorg (SendErrorToClient+0x10e)
[0x4365ee]
[  6497.070] (EE) 10: /usr/lib/xorg-server/Xorg (remove_fs_handlers+0x463)
[0x43a7f3]
[  6497.071] (EE) 11: /usr/lib/libc.so.6 (__libc_start_main+0xf1)
[0x7f2d13c54291]
[  6497.072] (EE) 12: /usr/lib/xorg-server/Xorg (_start+0x29) [0x4246e9]
[  6497.073] (EE) 13: ? (?+0x29) [0x29]
[  6497.073] (EE) 
[  6497.073] (EE) Segmentation fault at address 0x4
[  6497.073] (EE) 
Fatal server error:
[  6497.073] (EE) Caught signal 11 (Segmentation fault). Server aborting

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