On 09/20/2016 08:26 PM, Kai Krakow wrote:
>>
>> I've noticed a couple more things. One is after resume from standby
>> the plasma taskbar hangs at 100% cpu for 2-3 minutes, during which
>> time you can't open the K menu, click on open programs in the task
>> bar or start any apps. The tray icons and clock are also frozen. Has
>> anyone experienced this? It only does this after resume, it seems to
>> be fine otherwise.
> 
> Any chances you're using calendar access in plasma widgets? I'm using
> calendars via akonadi-ews, and the clock widget has access to this
> (also korgac integrates with the plasma bars and accesses the
> calendar). This leads plasma to blocking for about 1 minute after login
> or resume - but only due to heavy writes of logs about zoneinfo that
> cannot be found. The problem here is that Outlook uses very strange
> time zone names (which even seem to change from version to version, I
> wonder how MS programmers keep track of it). The solution was to simply
> symlink the missing names (which you can extract from the X session
> logs and/or journal) to /usr/share/zoneinfo/localtime and now it works
> and my calendar events are even at the correct hour (and not shifted to
> another time zone). For me, blocking of plasma is now gone or at least
> reduced to a very short time.

Well, I think I might have solved this one for now. I was using the
nouveau driver and I was playing a news clip and had no sound and when I
clicked on the volume control in the tray my computer hardlocked.

I was able to ssh in to see that nouveau was crashing constantly trying
to do what plasma was asking of it; I have installed the recommended
nvidia-drivers version that was mentioned on nvidia's site and now it
seems to be okay.

Six or so months ago I tried both nouveau and nvidia's drivers and they
were both crashing plasma every 10-20 seconds.

> 
>> Is there a way to speed up alt-tab switching? Often I hit alt-tab
>> expecting it to switch to another app but nothing happens. I have to
>> hit it two or sometimes even three (!) times to make it switch. This
>> is really irritating and slows down my work flow.
> 
> I wonder about this annoying bug, too. As a programmer this is
> absolutely irritating as I do a lot of alt+tab between editors, logs,
> web browsers, and documentation. :-(
> 
> Something similar happens when switching tasks using the mouse:
> Sometimes the first click on a taskbar icon is simply not fully
> recognized, it just switches focus to plasma but doesn't switch the
> application to front.
> 
> Sometimes I feel like this may be related to having multiple monitors
> connected.

I do not have multiple monitors. I haven't seen the mouse issue yet as
when alt+tab isn't working I have to resort to the dang mouse and it
always works.

However, on the plus side, I disabled the compositor effects on the
alt-tab switching and so now it works as expected.

I've attached a small screenshot, make sure what I've circled in red is
NOT checked. It's under system settings -> window management -> task
switcher.

Dan