Bug 408493 - Desktop briefly visible before lock screen appears
Summary: Desktop briefly visible before lock screen appears
Status: RESOLVED DUPLICATE of bug 316734
Alias: None
Product: kscreenlocker
Classification: Plasma
Component: general (show other bugs)
Version: unspecified
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-06-09 17:23 UTC by J.Novo
Modified: 2021-06-21 21:20 UTC (History)
8 users (show)

See Also:
Latest Commit:
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Description J.Novo 2019-06-09 17:23:08 UTC
SUMMARY
I have the energy saving settings to suspend the session, after the suspend when i come to the computer i see first the desktop and then it loads the lock screen.


STEPS TO REPRODUCE
1. Let the system suspend with power management.
2. Try to log in.

OBSERVED RESULT
The desktop comes first and then it loads the lock screen.

EXPECTED RESULT
The lock screen should be loaded already, or the desktop should not be visible while loading the lock screen.

SOFTWARE/OS VERSIONS
Operating System: KDE neon 5.15
KDE Plasma Version: 5.15.5
KDE Frameworks Version: 5.59.0
Qt Version: 5.12.3
Kernel Version: 4.15.0-51-generic
OS Type: 64-bit
Comment 1 Martin Flöser 2019-07-08 19:59:20 UTC
Most likely a graphics driver failure. The infrastructure ensures to lock prior to suspend.
Comment 2 Patrick Silva 2020-10-14 21:03:41 UTC
*** Bug 415362 has been marked as a duplicate of this bug. ***
Comment 3 Patrick Silva 2020-10-14 21:03:47 UTC
*** Bug 414414 has been marked as a duplicate of this bug. ***
Comment 4 Tristan Miller 2020-10-16 10:10:27 UTC
(In reply to Martin Flöser from comment #1)
> Most likely a graphics driver failure. The infrastructure ensures to lock
> prior to suspend.

I agree -- I recently changed from the ancient X.Org xf86-video-intel driver to the standard modesetting driver, per Bug 395583 Comment 20, and now I am no longer experiencing this issue.

Anyone who is still experiencing this issue, please check if you are using the xf86-video-intel driver, and if so, try switching to the modesetting driver instead.  (Or conversely, if you are using the modesetting driver on a very old Intel graphics controller, try changing to xf86-video-intel.)
Comment 5 Nate Graham 2020-10-16 11:21:12 UTC
Can anyone else confirm the same behavior?
Comment 6 Tristan Miller 2020-10-23 12:29:09 UTC
(In reply to Tristan Miller from comment #4)
> I recently changed from the ancient X.Org xf86-video-intel driver
> to the standard modesetting driver, per Bug 395583 Comment 20, and now I am
> no longer experiencing this issue.

Scratch that; I'm now continuing to see the behaviour again, even with the modesetting driver.  Maybe it happens less often, but it still does happen occasionally.
Comment 7 Bug Janitor Service 2020-11-07 04:33:41 UTC
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 8 Tristan Miller 2020-11-08 09:52:20 UTC
Clearing the needinfo flag as I assume this was due to my mistaken comment.
Comment 9 kde 2021-03-02 07:21:49 UTC
(In reply to Nate Graham from comment #5)
> Can anyone else confirm the same behavior?

It happens on amdgpu with kernel parameter "amdgpu.dc=0" set.
The default "amdgpu.dc=1" doesn't have the issue (but other problems).

Operating System: openSUSE Tumbleweed 20210223
KDE Plasma Version: 5.21.0
KDE Frameworks Version: 5.79.0
Qt Version: 5.15.2
Kernel Version: 5.10.16-1-default
OS Type: 64-bit
Graphics Platform: X11
Processors: 24 × AMD Ryzen 9 3900X 12-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: Radeon RX 570 Series
Comment 10 Nate Graham 2021-06-21 21:20:28 UTC

*** This bug has been marked as a duplicate of bug 316734 ***