| Summary: | 5.17 lost the ability to detect when a monitor is unplugged during a session | ||
|---|---|---|---|
| Product: | [Plasma] KScreen | Reporter: | Michał Dybczak <michal.dybczak> |
| Component: | common | Assignee: | kscreen-bugs-null <kscreen-bugs-null> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | major | CC: | cribari, freggel.doe, i, lorenzo.cavazzi.tech, nate, plasma-bugs, postix, subdiff |
| Priority: | HI | Keywords: | regression |
| Version: | 5.17.0 | ||
| Target Milestone: | 1.0 | ||
| Platform: | Manjaro | ||
| OS: | Linux | ||
| See Also: | https://bugs.kde.org/show_bug.cgi?id=372837 | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
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Description
Michał Dybczak
2019-10-19 07:12:22 UTC
Just fixed! Awesome! Thanks :). I'll wait for the update then and report if it helped. (In reply to Nate Graham from comment #1) > Just fixed! How should https://cgit.kde.org/kscreen.git/commit/?h=Plasma/5.17&id=2ab4c2f136c5d7c00cd08e99f43670b55a2a6a58 fix the issue described here? I could use some more information from you: run xrandr -q before and after the hot plug. What does the screen configuration KCM KScreen show? Laptop's screen: Screen 0: minimum 320 x 200, current 3520 x 1080, maximum 16384 x 16384 eDP-1 connected primary 1920x1080+1600+0 (normal left inverted right x axis y axis) 382mm x 215mm Secondary monitor: HDMI-1-3 connected 1600x900+0+0 (normal left inverted right x axis y axis) 434mm x 236mm After I unplugged it, the system didn't detect it, but when I ran command xrandr -q it blinked and recognized the other monitor is off. So somehow using xrandr updates the state but without it, it's not. The other way is true as well. I plugged in the second monitor, monitor detected that something was plugged and showed "scanning HDMI signal" but there was no signal because the system didn't react to it. This wasn't changing untill I used xrandr command again, screens flickered, the picture in secondary monitor showed up. By the way, browser and terminal window moved to the second screen although they were originally in the first one. One could write a book about multi-monitor setup inconsitencies and weird things. I updated to Plasma 5.17.1, rebooted, unplugged the secondary monitor and no change. The system still isn't aware of that fact and is outputting to the unexisting monitor. It looks like the concerns and doubts of some users here came true. The fix wasn't addressing this issue at all. Today I plugged in the second monitor and it was detected automatically, so it looks like I need to gather more data to judge what is going on and if the patch really helped or not. Darn. In my recent experience, it detects monitors that are plugged in, but has trouble with monitors that are unplugged. Yes, that is my experience too. So it got better with 5.17.1 update but partially. This is not done yet. I went to debug this with Roman today but found that I'm no longer able to reproduce the issue with either Plasma 5.17.3 or git master. Are you? Out of curiosity, can you reproduce this only when you unplug the device while it's off/asleep, or can you also reproduce it when you unplug the device while it's displaying something? *** This bug has been marked as a duplicate of bug 372837 *** Some friends said the problem disappeared after upgrading to kernel 5.3.8. I also didn't reproduce this problem for the whole week, plugging and unplugging HDMI many times. If any of you can still reproduce this, what is the kernel version you are using? Can you try to upgrade to kernel 5.3.8 and retry? I have kernel 5.3.10 and just upgraded to Plasma 5.17.3. Unplugging secondary monitor don't trigger any reaction. So the issue is still there :( |