| Summary: | A 4k laptop cloned to a FHD external display does not come back automatically to 4k resolution | ||
|---|---|---|---|
| Product: | [Plasma] kwin | Reporter: | frederic.parrenin <frederic.parrenin> |
| Component: | multi-screen | Assignee: | KWin default assignee <kwin-bugs-null> |
| Status: | RESOLVED NOT A BUG | ||
| Severity: | normal | CC: | nate |
| Priority: | NOR | ||
| Version First Reported In: | 5.24.3 | ||
| Target Milestone: | --- | ||
| Platform: | Other | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed/Implemented In: | ||
| Sentry Crash Report: | |||
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Description
frederic.parrenin@univ-grenoble-alpes.fr
2022-03-09 11:02:45 UTC
I'm afraid it doesn't work to report multiple bugs in a single bugzilla ticket. We'll never get anywhere this way. Can you open multiple Bugzilla tickets, one per issue? See https://community.kde.org/Get_Involved/Issue_Reporting#One_issue_per_Bugzilla_ticket In these separate bug reports, please add information about the versions of KDE and Qt software you're using, and mention whether you're using the X11 session or the Plasma session. Finally, please mention if you have manually set the PLASMA_USE_QT_SCALING=1 environment variable, or not. Thanks! > I'm afraid it doesn't work to report multiple bugs in a single bugzilla ticket. We'll never get anywhere this way. Can you open multiple Bugzilla tickets, one per issue? See https://community.kde.org/Get_Involved/Issue_Reporting#One_issue_per_Bugzilla_ticket Yes, sorry for my bad behavior, I knew that but was in a hurry. I will try to report separately. My hope was that a KDE dev would test this setting: 4k laptop with X11/200% scaling, <FHD external monitor, clone mode. > In these separate bug reports, please add information about the versions of KDE and Qt software you're using, and mention whether you're using the X11 session or the Plasma session. Finally, please mention if you have manually set the PLASMA_USE_QT_SCALING=1 environment variable, or not. Sorry I meant to report that. This is with X11. KDE version tested was 5.23.5. I will test with 5.24.3 tomorrow. I have not set manually PLASMA_USE_QT_SCALING. I have that exact setup and can confirm that it works very poorly. This is a known issue with X11 that is essentially impossible to fix, unfortunately. The only real solution is to use the Wayland session, where mixed-DPI multimonitor setups work much much better. Can you try it out and see how it works for you? > I have that exact setup and can confirm that it works very poorly. Good to know you have that setup, this way problem will be fixed more quickly! :-) > This is a known issue with X11 that is essentially impossible to fix, unfortunately. I know that on X11, the scaling is only global and not per-monitor. But still, there are not so many problems on X11/Gnome. On KDE, basically, when you try the clone mode with this setup, it messes up your display settings and the only way I found to come back to the normal state is to exit the Plasma session. > The only real solution is to use the Wayland session, where mixed-DPI multimonitor setups work much much better. Can you try it out and see how it works for you? OK, I will try the Wayland session tomorrow as well. Thanks Nate. So I tested again the problem today with X11 and 5.24.3, and things work much better now. I don't know if this is the update to 5.24.3 or the fact that I restarted the plasma session. Now, I can come back to the 4k resolution once the external monitor is connected, so I think the main issue is gone. The only minor problem I see is that the resolution does not come back automatically to 4k, it stays in FHD, and you have to go to the display settings and manually change the resolution. So I changed the title accordingly. On Wayland, things work much better, since both display have their own resolution which are not affected by the clone mode. One issue I remarked with Wayland though is that the presentation mode of LibreOffice does not appear on the external display, but that is for another bug report... The LibreOffice bug you reported to has apparently nothing to do with the presentation mode of Impress. I reported the wayland LibreOffice presentation problem here: https://bugs.kde.org/show_bug.cgi?id=451852 Not sure if this bug belongs to kwin or to LibreOffice, though. |