https://bugs.kde.org/show_bug.cgi?id=357988
Bug ID: 357988
Summary: Black screen when reconnecting display
Product: kwin
Version: 5.5.3
Platform: Exherbo Packages
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: li...@bernd-steinhauser.de
This sounds very similar to bug 353975, but I'm pretty sure, that there are two
bugs, one in plasmashell and one in kwin or X11 or driver. bug 356322 could be
related as well but is for 4.x
The bug in plasmashell causes one screen to misbehave, there is no desktop
background shown, no context menu available etc., but windows can be moved
there and are usable.
The bug in kwin behaves different. The screen is completely black, only the
mouse pointer is visible if moved there. Windows can be moved there, but will
not show up.
Neither `kwin_x11 --replace` nor a restart of plasmashell will fix this.
Suspending compositing does not help either.
It will however be fixed when switching to the console (i.e. Ctrl+Alt+F2) and
back.
There is no flickering when doing so.
Currently, it happens every time I disconnect and reconnect the screen, but
I've also seen a rate of approx. 50% 2 or 3 weeks ago.
Reproducible: Always
The driver is the radeonsi driver. mesa is currently scm, but have seen this
with 11.x as well.
Kernel is 4.4, xorg-server is at 1.18.0.
These are the messages I get when disconnecting the screen. Upon reconnection,
there are no messages from kwin directly:
QXcbConnection: XCB error: 3 (BadWindow), sequence: 47691, resource id:
12582942, major code: 19 (DeleteProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 47693, resource id:
12582942, major code: 19 (DeleteProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 47694, resource id:
12582942, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 47695, resource id:
12582942, major code: 19 (DeleteProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 47696, resource id:
12582942, major code: 19 (DeleteProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 47697, resource id:
12582942, major code: 19 (DeleteProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 47698, resource id:
12582942, major code: 7 (ReparentWindow), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 47699, resource id:
12582942, major code: 6 (ChangeSaveSet), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 47700, resource id:
12582942, major code: 2 (ChangeWindowAttributes), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 47701, resource id:
12582942, major code: 10 (UnmapWindow), minor code: 0
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