Bug 109150 - "failed to set DRM interface version 1.4: Permission denied" after resume for lock screen.
Summary: "failed to set DRM interface version 1.4: Permission denied" after resume for...
Status: NEW
Alias: None
Product: DRI
Classification: Unclassified
Component: libdrm (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Default DRI bug account
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Reported: 2018-12-25 15:49 UTC by nanericwang
Modified: 2019-02-07 18:09 UTC (History)
0 users

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i915 platform:
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Attachments
Xorg log before lock screen. (35.91 KB, text/plain)
2018-12-25 15:49 UTC, nanericwang 		no flags Details
xorg log after resume from lock screen (monitor suspended) (21.92 KB, text/plain)
2018-12-25 15:50 UTC, nanericwang 		no flags Details
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Description nanericwang 2018-12-25 15:49:30 UTC 
Created attachment 142890 [details]
Xorg log before lock screen.

Everytime after resume from a lock screen (monitor suspend), I see the following error from xorg log:

[    20.962] (II) xfree86: Adding drm device (/dev/dri/card0)
[    20.962] (EE) /dev/dri/card0: failed to set DRM interface version 1.4: Permission denied


There is no such errors at first boot (before lock screen).

My question:

- How to know what is trying to access "/dev/dri/card0"? Where is the log?
- Why it is trying to access "/dev/dri/card0", given that the xorg is started already?
Comment 1 nanericwang 2018-12-25 15:50:23 UTC 
Created attachment 142891 [details]
xorg log after resume from lock screen (monitor suspended)
Comment 2 Emil Velikov 2019-02-07 18:09:06 UTC 
The log says

systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration

Thus the FD is handled manually and for some reason fails on your end. Normally I would suggest adding the -keeptty. If that's not an option please bisect which project/commit cause this issue - kernel, libdrm or Xorg.

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