Bug 412552

Summary:	Extended screen on 2 displays overlaps by 1px
Product:	[Plasma] KScreen	Reporter:	elman <elman>
Component:	kcm	Assignee:	kscreen-bugs-null <kscreen-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	nate, subdiff
Priority:	NOR
Version First Reported In:	5.16.5
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	screen configuration

Description elman 2019-10-03 10:39:57 UTC

SUMMARY
I have 2 monitors, I use extended display. When I configure them next to each other, they overlap by 1px.


STEPS TO REPRODUCE
1. Connect 2 monitors
2. Make extended workspace
3. Configure secondary monitor on right and snap it to the main monitor.
4. Set separate wallpaper for each monitor

OBSERVED RESULT
If I click on primary (left) monitor, I can see 1px of wallpaper on secondary (right) and vice versa.

EXPECTED RESULT
Screens do not overlap.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE neon 5.16
KDE Plasma Version: 5.16.5
KDE Frameworks Version: 5.62.0
Qt Version: 5.12.3

ADDITIONAL INFORMATION
I'm using X11.
Primary monitor has width of 1920px, so I assume it is placed at coordinates 0-1919. Secondary monitor is configured at coordinates 1919-3839. So this would mean that pixels at 1919 are actually displayed at both monitors showing 1px overlap. Shouldn't secondary monitor start at 1920?

This might have relation to Bug 339602.

Comment 1 elman 2019-10-03 10:40:31 UTC

Created attachment 122988 [details]
screen configuration

Comment 2 Roman Gilg 2019-10-03 18:33:52 UTC

Try again with 5.17 (KScreen reworked).

Comment 3 Nate Graham 2019-10-07 00:26:46 UTC

Please let us know whether or not this is fixed with Plasma 5.17 which is due to be released in a little under two weeks.

Comment 4 elman 2019-10-07 07:33:32 UTC

Unfortunately I'm using Neon on my work notebook, so I can't switch to testing branch. However I will try to boot live testing ISO to check it out.

Comment 5 elman 2019-10-10 07:01:40 UTC

Neon 5.16.90 live ISO doesn't want to boot on my notebook. It got stuck with black  screen and white cursor after loading screen and before logon screen. When I tried another USB port, it got stuck on loading screen. So I guess I will try again when Plasma 5.17 is released.

Comment 6 elman 2019-10-15 21:59:25 UTC

I confirm that this issue is indeed fixed in 5.17. You may close this issue. 

Thank you.

Comment 7 Nate Graham 2019-10-15 22:00:57 UTC

Sweet!