Bug 108516 - Device name mismatch with /sys/class/drm
Summary: Device name mismatch with /sys/class/drm
Status: RESOLVED NOTABUG
Alias: None
Product: xorg
Classification: Unclassified
Component: Server/DDX/Xorg (show other bugs)
Version: unspecified
Hardware: Other All
: medium major
Assignee: Xorg Project Team
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-10-22 19:34 UTC by JM9
Modified: 2018-10-24 08:18 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:


Attachments
xorg log (31.87 KB, text/plain)
2018-10-23 18:26 UTC, JM9
no flags Details

Note You need to log in before you can comment on or make changes to this bug.
Description JM9 2018-10-22 19:34:23 UTC
In /sys/class/drm device names are:
card0-DP-1  card0-DP-2  card0-DP-3  card0-eDP-1  card0-VGA-1

However, xrardr reports:
eDP1, VGA1, DP-1-1, DP-1-2, DP-1-3

This is on an Optimus laptop with Hybrid Graphics enabled. With Hybrid Graphics disabled, xrandr reports correct device names.

This started with xorg version 1.20
Comment 1 Michel Dänzer 2018-10-23 09:14:26 UTC
Please attach the corresponding Xorg log file.
Comment 2 JM9 2018-10-23 18:26:54 UTC
Created attachment 142159 [details]
xorg log
Comment 3 JM9 2018-10-23 18:27:11 UTC
(In reply to Michel Dänzer from comment #1)
> Please attach the corresponding Xorg log file.

xorg log attached.
Comment 4 Michel Dänzer 2018-10-24 08:18:04 UTC
According to the Xorg log file, eDP and VGA are connected to the integrated Intel GPU, used as primary by Xorg, whereas DP-[123] are connected to the discrete Nvidia GPU, used as a secondary by GPU. Outputs of secondary GPUs get a suffix (like -1 in this case) to avoid output name clashes between GPUs.


Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.