My experience with kmail (was:Goodbye for now, kmail)

[Sérgio Basto]

On Sat, 2017-08-26 at 00:27 +0100, Sérgio Basto wrote:
> On Sun, 2017-06-11 at 21:22 +0100, Sérgio Basto wrote:
> > On Sun, 2017-05-14 at 13:50 +0100, Sérgio Basto wrote:
> > > Hello 
> > > I just want thank you for who alert me for akonodi consume cpu
> > > problems
> > > , since a year ago I started have problems, the most notable was
> > > with
> > > firefox very slow consuming high level of CPU more than 100%, all
> > > system slow , after a while I discover that clean kde cache
> > > [1]  ,
> > > and reboot fix the problem for a while , problems usually just
> > > appears when I go to a place where internet is not stable ( some
> > > offices that internet goes down etc) but after do (5 days ago):
> > > 
> > > 	akonadictl stop
> > > 
> > > all problems are gone, my laptop now is bullet prove , Firefox
> > > doesn't
> > > consume more than 15% of CPU , even when in stress, when before
> > > consume
> > > more than 100% of one core , I got 4 . 
> > 
> > After check, not only akonadi consume 100% CPU I some
> > circumstances,
> > also firefox have the same symptoms, it happens when iwlwifi (intel
> > wireless) goes down ...  
> 
> JFTR
> 
> After digging and search all possible causes , I understood that was
> my
> kinit4 process and after one week I can say that was xrender option,
> system settings -> configure desktop effects -> advance -> composite
> type , was a non default xrender and when change it to opengl 2.0 ,
> (my
> intel graphics don't have opengl 3.0) I stop have very slow computer
> and 
> warnings like this : kernel: perf: interrupt took too long (42002 >
> 41952), lowering kernel.perf_event_max_sample_rate to 4000
> 
> Also akonadi works much better . 

Sorry but think I should report it again , this end ups that maybe all
is related with xorg-x11-drv-intel-2.99.917-26.20160929.fc25.x86_64 and
newer kernels. 
Using what is the default drive of F26 ("modesetting") seems fixes the
problem and seems that is the root of the problem (xorg-x11-drv-intel-
2.99.917-26.20160929.fc25.x86_64) [2] not kde itself.

[2]
https://bugzilla.redhat.com/show_bug.cgi?id=1413251

> > > [1] cd /home/sergio/.kde; ls -l 
> > > rm -rf /var/tmp/kdecache-sergio /run/user/500/ksocket-sergio
> > > /tmp/kde-sergio 
> > > 
> > > Conclusion, looks to me that akonodi starts something like "a
> > > thread
> > > looping" which is not visible in top command nor another system
> > > monitor
> > > tools , but can affect all system ... , have some way to debug
> > > the
> > > problem could be useful. 
> > > 
> > > Best regards,
-- 
Sérgio M. B.