Bug 353189

Summary:	Display didn't come back after screen poweroff.
Product:	[Plasma] plasmashell	Reporter:	Rémi Vanicat <vanicat>
Component:	generic-multiscreen	Assignee:	Aleix Pol <aleixpol>
Status:	RESOLVED WORKSFORME
Severity:	major	CC:	kde, plasma-bugs-null
Priority:	NOR	Keywords:	triaged
Version First Reported In:	5.4.1
Target Milestone:	1.0
Platform:	Debian unstable
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Rémi Vanicat 2015-09-25 18:36:36 UTC

I've a non compliant screen (TV) that is shown as disconnected when it iss off. If I poweron it back, I've a blank screen (the TV say « no input »). Other DM have no problem to bring back the display.

Reproducible: Always

Steps to Reproduce:
1. Use a LG TV as only output
2. Turn off the TV (output will appear disconnected)
2. Turn on the TV

Actual Results:  
plasmashell is displayed

Expected Results:  
plasmashell do no bring back the display

I'm using closed source nvidia driver on this computer.

Comment 1 David Edmundson 2015-09-26 00:02:13 UTC

Is plasmashell still running after the TV comes back on? 
Are there any crash dialogs?

Comment 2 Rémi Vanicat 2015-09-26 07:29:14 UTC

Using ssh, I see that krunner kactivitymanage plasmashell klauncher kded5 kcminit_startup kacces and kwin_x11 have died.

I don't know it it is usefull, but when the TV is off, xrandr tell me that:
$ DISPLAY=:0 xrandr                                                 -~
Screen 0: minimum 8 x 8, current 8 x 8, maximum 8192 x 8192
VGA-0 disconnected (normal left inverted right x axis y axis)
DVI-D-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)

turning the tv on, and reactivating it with xrandr lead to an empty display, with nothing but the mouse cursor, so no crash dialogs to be seen.

Comment 3 Andrew Crouthamel 2018-09-25 21:46:28 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 set the bug status 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 4 Andrew Crouthamel 2018-10-27 04:11:23 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now 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

Thank you for helping us make KDE software even better for everyone!