Are you using kwin or comptom?

If kwin, please check https://bugs.freedesktop.org/show_bug.cgi?id=80349 and https://bugs.kde.org/show_bug.cgi?id=336589

(In reply to comment #1)
> Are you using kwin or comptom?

kwin

> If kwin, please check https://bugs.freedesktop.org/show_bug.cgi?id=80349 and
> https://bugs.kde.org/show_bug.cgi?id=336589

So I applied the fix, rebuilt kde workspace, installed, but it still happens.

=0 ickle:/usr/src/xf86-video-intel$ git log 8587b2fff218537c6ff568ac3ef561f0d39f03ff..e0523ade28fa0da00d0bd70d8b22d53ed4e49f73
commit e0523ade28fa0da00d0bd70d8b22d53ed4e49f73
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Jul 9 12:10:15 2014 +0100

    sna: Reduce reflections onto rotations
    
    In order to support a wider range of rotation/reflections, perform a
    simple reduction of the requested rotation first.
    
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

commit 251bcc32eed37ee10eb14ce2278ecbdcc40a7cde
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Thu Jul 10 21:01:57 2014 +0100

    configure: Provide a poor man's replacement for getline()
    
    uClibc is one such library that doesn't implement getline()
    
    Reported-by: Ben Widawsky <benjamin.widawsky@intel.com>
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>


So one of those two???

(In reply to comment #3)
> =0 ickle:/usr/src/xf86-video-intel$ git log
> 8587b2fff218537c6ff568ac3ef561f0d39f03ff..
> e0523ade28fa0da00d0bd70d8b22d53ed4e49f73
> commit e0523ade28fa0da00d0bd70d8b22d53ed4e49f73
> Author: Chris Wilson <chris@chris-wilson.co.uk>
> Date:   Wed Jul 9 12:10:15 2014 +0100
> 
>     sna: Reduce reflections onto rotations
>     
>     In order to support a wider range of rotation/reflections, perform a
>     simple reduction of the requested rotation first.
>     
>     Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> 
> commit 251bcc32eed37ee10eb14ce2278ecbdcc40a7cde
> Author: Chris Wilson <chris@chris-wilson.co.uk>
> Date:   Thu Jul 10 21:01:57 2014 +0100
> 
>     configure: Provide a poor man's replacement for getline()

Hmm, and I tried to checkout 251bcc32eed3 and it still happens. So it must be something else :/.

Is:

[     5.703] (II) intel(0): direct rendering: DRI2 DRI3 enabled
[     5.703] (II) intel(0): hardware support for Present enabled

new?

You can try: xorg.conf:

Section "Device"
  Identifier "Intel"
  Option "DRI" "2"
EndSection

(In reply to comment #5)
> Is:
> 
> [     5.703] (II) intel(0): direct rendering: DRI2 DRI3 enabled
> [     5.703] (II) intel(0): hardware support for Present enabled
> 
> new?

According to attachment 102302 [details] from bug 80948, yes.

> You can try: xorg.conf:
> 
> Section "Device"
>   Identifier "Intel"
>   Option "DRI" "2"
> EndSection

I will, thanks.

(In reply to comment #6)
> > You can try: xorg.conf:
> > 
> > Section "Device"
> >   Identifier "Intel"
> >   Option "DRI" "2"
> > EndSection
> 
> I will, thanks.

Tested, I think I haven't seen what I originally reported here yet.

But there is still a glitch: hovering over KDE's systemsettings icons to see "hints". When I go over one icon, it's OK, when I move the cursor to another one, the old disappears, but not smoothly. It's still blinking. This may be a completely different story though.

(In reply to comment #7)
> But there is still a glitch: hovering over KDE's systemsettings icons to see
> "hints". When I go over one icon, it's OK, when I move the cursor to another
> one, the old disappears, but not smoothly. It's still blinking. This may be
> a completely different story though.

Can you please just hit one bug at a time in future! ;-)

(In reply to Jiri Slaby from comment #7)
> (In reply to comment #6)
> > > You can try: xorg.conf:
> > > 
> > > Section "Device"
> > >   Identifier "Intel"
> > >   Option "DRI" "2"
> > > EndSection
> > 
> > I will, thanks.
> 
> Tested, I think I haven't seen what I originally reported here yet.

Are you now able verify whether your issue was DRI3 specific?


> But there is still a glitch: hovering over KDE's systemsettings icons to see
> "hints". When I go over one icon, it's OK, when I move the cursor to another
> one, the old disappears, but not smoothly. It's still blinking. This may be
> a completely different story though.

I am going to guess that this was the expensive implicit fencing that mesa required for dri3.