Bug 103794 - Please set up RandR 1.5 monitors automatically as per the TILE properties
Summary: Please set up RandR 1.5 monitors automatically as per the TILE properties
Alias: None
Product: xorg
Classification: Unclassified
Component: Server/Ext/RandR (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Xorg Project Team
QA Contact: Xorg Project Team
Depends on:
Reported: 2017-11-17 14:26 UTC by Michael Stapelberg
Modified: 2018-12-13 18:33 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

xrandr --props (4.71 KB, text/plain)
2017-11-17 14:26 UTC, Michael Stapelberg
no flags Details

Description Michael Stapelberg 2017-11-17 14:26:07 UTC
Created attachment 135557 [details]
xrandr --props

I use X.Org 1.19.3 on Linux.

I use a Dell UP2414Q monitor, which exposes two outputs via Multi-Stream Transport (MST). I verified this issue is also present when using a display requiring multiple connections, e.g. the Dell UP3218K, which uses 2 DisplayPort connections.

When starting Xorg, the position of the individual outputs relative to each other is the wrong way around: instead of (left half, right half), I see (right half, left half) on my monitor.

Also, when using xrandr --listmonitors, I see 2 monitors instead of 1.

To fix this, I currently use the following in my ~/.xsession:

xrandr --output DP-5.8 --auto --right-of DP-5.9
xrandr --setmonitor up2414q auto DP-5.8,DP-5.9

I think it would be better if Xorg (specifically the RANDR extension, I suppose?) would look at the TILE property, arrange the outputs accordingly and create a monitor object accordingly.

I attached the output of xrandr --props.

Please let me know if you need any further details.

Comment 1 GitLab Migration User 2018-12-13 18:33:39 UTC
-- GitLab Migration Automatic Message --

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