| Summary: | Plasma startup freezes system, with Nouveau, since Qt 5.12.1 | ||
|---|---|---|---|
| Product: | Mageia | Reporter: | JanKusanagi <jan-bugs> |
| Component: | RPM Packages | Assignee: | KDE maintainers <kde> |
| Status: | RESOLVED FIXED | QA Contact: | |
| Severity: | major | ||
| Priority: | Normal | CC: | andrewsfarm, geiger.david68210, jan-bugs, mageia, mageia, marja11 |
| Version: | Cauldron | ||
| Target Milestone: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| URL: | https://bugs.freedesktop.org/show_bug.cgi?id=109556 | ||
| See Also: | https://bugs.mageia.org/show_bug.cgi?id=24060 | ||
| Whiteboard: | |||
| Source RPM: | qtbase5-5.12.1-1.mga7.src.rpm | CVE: | |
| Status comment: | |||
| Attachments: | dmesg output of one instance where the freeze was not absolute | ||
|
Description
JanKusanagi
2019-02-05 23:07:14 CET
Created attachment 10732 [details]
dmesg output of one instance where the freeze was not absoluteCC:
(none) =>
jan-bugs I pasted a link twice there. It was supposed to be: https://bugs.archlinux.org/task/61638 Another fd.o report: https://bugs.freedesktop.org/show_bug.cgi?id=109558
Martin Whitaker
2019-02-06 22:38:46 CET
CC:
(none) =>
mageia
Marja Van Waes
2019-02-07 08:14:00 CET
CC:
(none) =>
marja11 Users in Archlinux's bug report seem to be mixing two different issues, but in any case, point to a bugreport to Qt that seems interesting, with a possible patch: https://bugreports.qt.io/browse/QTBUG-73691 From what I can understand, the problem might be with whitelisting the use of multithreading in more situations. I remember QWebEngine having serious problems with Nouveau due to exactly that, multithreading issues. (In reply to Nicolas Lécureuil from comment #5) > Please test next qtbase5 FWIW Nicolas, just got that update, and early indications are that it has fixed the flickering that's been seen with the Intel i915 driver, Bug 24060. Will try nouveau on my old nvidia Geforce 9800GT tomorrow. CC:
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andrewsfarm (In reply to Nicolas Lécureuil from comment #5) > Please test next qtbase5 Thanks! I'll test this as soon as I can reboot, hopefully tonight =) I have now tested with nouveau, and from what I've seen so far Plasma is now the most stable with nouveau that I have seen so far - and that includes all of Mageia 6. BTW, I made sure that nouveau and OpenGL 2.0 were both being used. Makes me really wonder if some of the older nvidia hardware, those no longer supported with proprietary drivers, would now work with Plasma. Tried now on a machine using a Geforce 210 card. First boot after getting many updates was using Xrender as compositor. That was stable. Another boot after switching to OpenGL 2.0 had a few glitches (Jittery scrolling using mouse wheel in Firefox, flashing when the logout screen appeared), but did not freeze. Auto-login is active on these systems. The second and subsequent boots show a momentary (1-2 seconds) video glitch (a "scrambling" is how I would describe it) when the sddm video first shows, but corrects and is very stable after that, including when shutting down. Checking the 9800GT system again shows the same momentary glitch and subsequent stability. While not quite as perfect as I thought it was when I typed Comment 8, it is definitely now usable. (In reply to Nicolas Lécureuil from comment #5) > Please test next qtbase5 PER-FECT! Thanks! All issues, gone =) Perfectly running Plasma, with smooth compositing and everything, no flickering, no issues at all (so far, at least, after one hour). Although, contrary to some other people, I had no flickering at all before the "Qt 5.12.1 disaster", either. I'll report again after more hours of use. Cheers! o/ So ~24h later, all's still good! \o/ Several months later, I think this can, quite safely, be closed =) So closing this bug! Resolution:
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FIXED |