FS#51653 - mesa-13.0 breaks displaylink.service

Attached to Project: Arch Linux
Opened by Brett (zekeb) - Wednesday, 02 November 2016, 20:49 GMT
Last edited by Doug Newgard (Scimmia) - Sunday, 06 November 2016, 17:05 GMT
Task Type Bug Report
Category Packages: Core
Status Closed
Assigned To No-one
Architecture x86_64
Severity High
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Description:

Upgrading to mesa-13.0.0 results in segmentation faults when an external monitor is attached. The segfault appears to involve glamor or libglamorgl.

By adding

Section "Device"
Identifier "Modesetting Graphics"
Driver "modesetting"
Option "AccelMethod" "none"
EndSection

to the xorg.conf (in particular the AccelMethod none line), you can disable glamoregl and start X without the segfault.

Unfortunately the displaylink external monitor still does not work, it is not recognized by xrandr.
Downgrading to mesa-12.0.3-3 and mesa-libgl-12.0.3-3 restores the displaylink functionality.


Additional info:
* mesa-13.0.0.0rc2-2
* config and/or log files etc.
see thread at the Arch forums for more info and a relevant logfile here:
https://bbs.archlinux.org/viewtopic.php?id=219039



Steps to reproduce:
This task depends upon

Closed by  Doug Newgard (Scimmia)
Sunday, 06 November 2016, 17:05 GMT
Reason for closing:  No response
Comment by Doug Newgard (Scimmia) - Thursday, 03 November 2016, 01:24 GMT
WTF is displaylink.service?