[kwin] [Bug 361598] Alt+Tab does not always work when pressing it quickly

[Daniel Lichtenberger]

https://bugs.kde.org/show_bug.cgi?id=361598

--- Comment #11 from Daniel Lichtenberger  ---
Seems to have been fixed (my HW didn't change).

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[kwin] [Bug 361598] Alt+Tab does not always work when pressing it quickly

[Alexander Potashev]

https://bugs.kde.org/show_bug.cgi?id=361598

Alexander Potashev  changed:

   What|Removed |Added

 Status|NEEDSINFO   |RESOLVED
 Resolution|WAITINGFORINFO  |WORKSFORME

--- Comment #10 from Alexander Potashev  ---
Could not reproduce lately, might be indeed fixed. May be it was only
reproducible on machines of really poor performance.

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[kwin] [Bug 361598] Alt+Tab does not always work when pressing it quickly

[Andrew Crouthamel]

https://bugs.kde.org/show_bug.cgi?id=361598

Andrew Crouthamel  changed:

   What|Removed |Added

   Keywords||triaged

--- Comment #9 from Andrew Crouthamel  ---
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 15 days.
Please provide the requested information as soon as possible and set the bug
status as REPORTED. Due to regular bug tracker maintenance, if the bug is still
in NEEDSINFO status with no change in 30 days, the bug will be closed as
RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki
located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please set the bug
status as REPORTED so that the KDE team knows that the bug is ready to be
confirmed.

Thank you for helping us make KDE software even better for everyone!

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[kwin] [Bug 361598] Alt+Tab does not always work when pressing it quickly

[Wolfgang Bauer]

https://bugs.kde.org/show_bug.cgi?id=361598

Wolfgang Bauer  changed:

   What|Removed |Added

 CC||wba...@tmo.at

--- Comment #8 from Wolfgang Bauer  ---
Maybe fixed by https://phabricator.kde.org/D13128 ?

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[kwin] [Bug 361598] Alt+Tab does not always work when pressing it quickly

[Daniel Lichtenberger]

https://bugs.kde.org/show_bug.cgi?id=361598

--- Comment #6 from Daniel Lichtenberger  ---
The only two lines kwin logs when switching windows with the script from my
previous comment are (after enabling debug options as described in
https://github.com/lxde/lxqt/issues/836#issuecomment-144931359):

kwin_tabbox: areKeySymXsDepressed:  any of  2
kwin_tabbox: 0 : keySymX=0x "ffe9"  i= 8  mask=0x "1"  keymap[i]=0x "1"


_Sometimes_ the last number is "0" instead of "1", as in:

kwin_tabbox: areKeySymXsDepressed:  any of  2
kwin_tabbox: 0 : keySymX=0x "ffe9"  i= 8  mask=0x "1"  keymap[i]=0x "0"

However, there doesn't seem to be a direct link between the issue and this
change in output (sometimes switching fails when it printed "0" before,
sometimes when it printed "1").

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[kwin] [Bug 361598] Alt+Tab does not always work when pressing it quickly

[Martin Gräßlin]

https://bugs.kde.org/show_bug.cgi?id=361598

--- Comment #5 from Martin Gräßlin  ---
You could run kwin from a konsole and watch the debug output.

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[kwin] [Bug 361598] Alt+Tab does not always work when pressing it quickly

[Daniel Lichtenberger]

https://bugs.kde.org/show_bug.cgi?id=361598

Daniel Lichtenberger  changed:

   What|Removed |Added

 CC||daniel.lichtenber...@gmx.ne
   ||t

--- Comment #4 from Daniel Lichtenberger  ---
I also experience this problem with Plasma 5.9.4. I tried disabling/modifying
various desktop effects, reducing or increasing animation speed, as well as
using the compact application switcher. 

When the application switcher fails, the Alt+Tab command seems to be
registered.  The current window briefly loses focus, but it is re-focused after
a short delay instead of switching to the previous window. 

I can kind of reliably reproduce the issue using xdotool, to rule out keyboard
or keypress timing issues:

for i in {1..10}; do echo 'Switching...'; xdotool key 'alt+Tab'; sleep 1; done

Usually this works as expected, toggling between the konsole window and the
previously selected window, but sometimes the same window gets focused multiple
times. I used several applications as the previous window (Dolphin, Firefox, VS
Code, ...), but couldn't notice a pattern. Is there any debug output that could
help diagnose the problem?

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[kwin] [Bug 361598] Alt+Tab does not always work when pressing it quickly

[Martin Gräßlin via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361598

Martin Gräßlin  changed:

   What|Removed |Added

 Resolution|--- |WAITINGFORINFO
 Status|UNCONFIRMED |NEEDSINFO

--- Comment #3 from Martin Gräßlin  ---
any information on the questions in comment #1 and comment #2 which could help
us?

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[kwin] [Bug 361598] Alt+Tab does not always work when pressing it quickly

[Christoph Feck via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361598

Christoph Feck  changed:

   What|Removed |Added

 CC||cf...@kde.org

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[kwin] [Bug 361598] Alt+Tab does not always work when pressing it quickly

[Martin Gräßlin via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361598

--- Comment #2 from Martin Gräßlin  ---
The window only shows if you have alt pressed for more than 90 msec. So if you
do a quick alt+Tab the window is not supposed to show. Is that maybe the case
for you?

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[kwin] [Bug 361598] Alt+Tab does not always work when pressing it quickly

[Thomas Lübking via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361598

Thomas Lübking  changed:

   What|Removed |Added

  Component|general |tabbox

--- Comment #1 from Thomas Lübking  ---
Might be rather a problem in kglobalaccel - if you assign the alt+tab shortcut
to something different (eg. showin krunner) and apply your "Press Alt+Tab and
release it very quickly™" pattern, does that trigger krunner reliably?

> Alexander Potashev 
Do you use a multilayout keyboard and/or some input mapper (xim, fctix, etc..)
for cyrillic input?

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