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Bug#840141: kwin-x11: Short freeze when showing multiple tray notifications



Hi,

Unfortunately this still happens. It does seem to be less often, and I've upgraded only knotifications related packages to test it properly.

Thank you,
Alex


On 17/10/16 12:20, Maximiliano Curia wrote:
I've uploaded a couple of extra fixes in knotifications 5.27, could you try these?

I'm not able to reproduce this issue, so I can't really test this.

On October 17, 2016 8:58:35 AM GMT+02:00, "Alex Dănilă" <nuorama@gmail.com> wrote:
Hi,

If there's a way to provide more info (even with minimal recompilation), 
I'd be glad to. Fixing this freeze can't happen to soon.

Running kwin and plasmashell from the terminal I get the following 
outputs when the freeze happens:

Currrent active notifications: QHash(("notification 211", "Network 
managementBluetooth (A0:E4:53:AC:F7:07)"))
Guessing partOf as: 0
  New Notification:  "Xperia Z1 Compact Network (nap)" "Connection 
'Xperia Z1 Compact Network (nap)' deactivated." -1 & Part of: 0
QXcbClipboard::setMimeData: Cannot set X11 selection owner
kde.systemtray: Wrong IconThemePath 
"/home/alex/.dropbox-dist/dropbox-lnx.x86_64-12.4.22/images" : too short 
or does not end with 'icons'
kde.systemtray: Wrong IconThemePath 
"/home/alex/.dropbox-dist/dropbox-lnx.x86_64-12.4.22/images" : too short 
or does not end with 'icons'
[kde.systemtray: Wrong
IconThemePath - Repeated endlessly]
QXcbConnection: XCB error: 2 (BadValue), sequence: 31522, resource id: 
54525973, major code: 142 (Unknown), minor code: 3
QXcbConnection: XCB error: 2 (BadValue), sequence: 31554, resource id: 
155189268, major code: 142 (Unknown), minor code: 3
QXcbConnection: XCB error: 2 (BadValue), sequence: 31580, resource id: 
65011733, major code: 142 (Unknown), minor code: 3
QXcbConnection: XCB error: 2 (BadValue), sequence: 31593, resource id: 
54525973, major code: 142 (Unknown), minor code: 3
QXcbConnection: XCB error: 2 (BadValue), sequence: 31606, resource id: 
150994972, major code: 142 (Unknown), minor code: 3
QXcbConnection: XCB error: 2 (BadValue), sequence: 31621, resource id: 
60817459, major code: 142 (Unknown), minor code: 3

However, the QXcbConnection part seems unrelated, since it is not always 
correlated with the notification and the freeze. I've also attached 
.xsession-errors from the last minutes when this reproduce, but to me it 
seems to not contain anything related.

Alex


On 11/10/16 01:20, Alex Dănilă wrote:
Hola! I believe this is rather and interaction between KWin and Plasmashell. If I stopped the Plasmashell process, the freeze doesn't happen anymore (those notifications are drawn at the top of the screen in small windows). A further argument for this idea is that after the freeze the screen goes one "frame" back, and that the music and cursor are not affected. I'll note that after restarting Plasmashell this doesn't happen as reliably as before. However, if you know a good way of triggering this kind of notifications, it will be my pleasure to do it. Thank you, Alex On 10/10/16 13:14, Maximiliano Curia wrote:
¡Hola Alex! El 2016-10-08 a las 22:32 +0300, Alex Dănilă escribió:
Package: kwin-x11 Version: 4:5.7.4-1 Severity: normal
The entire screens freeze for a couple of seconds (3-4, but sometimes seemed close to 10) everytime notifications from the tray are about to scroll down or disappear. This only affects drawing of screen content, it doesn't affect sound or cursor motion.
If relevant, the particular tray notifications are about bluetooth devices, I'll attach a screenshot with this. The particular order is like this: -two messages (M1 - connection deactivated, M2 - connection timed out) appear one above the other -2-3 seconds pass -freeze -2 -freeze ends -M1 disappears, M2 animates going down -messages reappear and animate again, but without freezes.
I'll send a screenshot after the bug is created, and if possible a recording.
As reported it seems that the issue is bluetooth specific, and it might be caused by an underlying issue of the bluetooth kernel module or hardware device. In my limited tests I couldn't reproduce this behaviour in my laptop. Would it be feasible for you to test this multiple bluetooth notifications in a different desktop environment in order to rule out a kernel/hardware issue? Can you reproduce this triggering a different type of notifications? Happy hacking,

--
Sent from my Android device with K-9 Mail. Please excuse my brevity.


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