Bug 462126

Summary:	After KWin restarts, Night Color Control becomes Night Color Is Not In Control
Product:	[Plasma] kdeplasma-addons	Reporter:	ratijas <me>
Component:	Night Color Control	Assignee:	Plasma Bugs List <plasma-bugs>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	kwin-bugs-null, vlad.zahorodnii
Priority:	NOR
Version:	master
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description ratijas 2022-11-22 13:49:30 UTC

SUMMARY

Night Color mode can't be toggled after KWin crash (or restart) until Plasma shell is also restarted.

STEPS TO REPRODUCE
1. Enable Night Color effect in System Settings, and turn it on. An icon should appear in system tray.
2. Crash KWin (it's easier than you think), or if you are not up to playing villain's role just restart it via systemctl.
3. Night Color Control applet's tooltip now says "Night Control is unavailable". Clicking it does nothing.
4. Restart plasmashell process.
5. Observe that applet is active and once again works as expected.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE: git-master
Qt Version: 5.15.7
Kernel Version: 6.0.9-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 970M/PCIe/SSE2
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: G752VT
System Version: 1.0

Comment 1 ratijas 2022-11-23 00:34:04 UTC

Can reproduce the issue with plain Rust & dbus-rs code. Trying to GetAll as soon as QDBusServiceWatcher::serviceRegistered happens results in this:

Error: D-Bus error: No such object path '/ColorCorrect' (org.freedesktop.DBus.Error.UnknownObject)

Basically, ColorCorrect is not yet initialized at the time of query. But if I add 0,5 second sleep, then it works.

Comment 2 Bug Janitor Service 2022-11-23 01:19:18 UTC

A possibly relevant merge request was started @ https://invent.kde.org/plasma/kdeplasma-addons/-/merge_requests/280

Comment 3 Bug Janitor Service 2022-11-29 17:40:02 UTC

A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/3251

Comment 4 ratijas 2022-11-29 22:40:52 UTC


*** This bug has been marked as a duplicate of bug 428854 ***

Comment 5 Bug Janitor Service 2022-11-30 10:45:58 UTC

A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/3253