FVWM: window move issue

[Martin Cermak]

Hello there!

Recently I noticed an issue moving windows using FVWM. The issue
is described in [1] and seems to be HW dependent. However,
successful usage of some other VMs on affected boxes makes me
think that the issue might be on the FVWM side. Ideas? Thoughts?


Regards,
Martin


--------------------
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1021782
https://bugzilla.redhat.com/show_bug.cgi?id=1086235

[Dan.Espen]

Post by Martin Cermak
Hello there!
Recently I noticed an issue moving windows using FVWM. The issue
is described in [1] and seems to be HW dependent. However,
successful usage of some other VMs on affected boxes makes me
think that the issue might be on the FVWM side. Ideas? Thoughts?

Red Hat says it's a driver issue.
I agree.

[Dominik Vogt]

Post by Dan.Espen

Post by Martin Cermak
Recently I noticed an issue moving windows using FVWM. The issue
is described in [1] and seems to be HW dependent. However,
successful usage of some other VMs on affected boxes makes me
think that the issue might be on the FVWM side. Ideas? Thoughts?

Red Hat says it's a driver issue.
I agree.

Me too. It looks like a severe redraw issue of the graphics
driver.

Ciao

Dominik ^_^ ^_^

[Martin Cermak]

Hi,

Post by Dominik Vogt

Post by Dan.Espen

Post by Martin Cermak
Recently I noticed an issue moving windows using FVWM. The issue
is described in [1] and seems to be HW dependent. However,
successful usage of some other VMs on affected boxes makes me
think that the issue might be on the FVWM side. Ideas? Thoughts?

Just rebuilt: $ fvwm --version
fvwm 2.6.6 (from cvs) compiled on Apr 22 2014 at 13:50:43
with support for: ReadLine, Stroke, XPM, PNG, SVG, Shape, XShm,
SM, Bidi text, Xinerama, XRender, XFT, NLS

but the issue is still here. Thomas, could you, please, point me
to particular commit which, you believe, should fix the issue?

Post by Dominik Vogt

Post by Dan.Espen
Red Hat says it's a driver issue.
I agree.

Peter is non-RH Fedora contributor.

Post by Dominik Vogt
Me too. It looks like a severe redraw issue of the graphics
driver.

Other VMs like xfce or gnome work fine. Also this happens on two
systems with different video cards..

Post by Dominik Vogt
Ciao
Dominik ^_^ ^_^
--
Dominik Vogt

Any further ideas or thoughts?

Thanks,
Martin

[Viktor Griph]

Post by Martin Cermak
[...]
Any further ideas or thoughts?

Does using the style "OpaqueMoveSize 0" also leave artifacts on the
screen when moving windows, or is it just opaque move that is
affected?

/Viktor

[Martin Cermak]

Post by Viktor Griph

Post by Martin Cermak
[...]
Any further ideas or thoughts?

Does using the style "OpaqueMoveSize 0" also leave artifacts on the
screen when moving windows, or is it just opaque move that is
affected?

OpaqueMoveSize has no effect. BUT it turns out that what's not
being redrawn is the root window. Nothing else. Using fvwm-root
to set some background image kind of fixes the issue for me.

Which is a good news I think :) However, there is some issue with
the root window redrawing, which would be worth of fixing I guess.

This happens with latest fedora 20 package fvwm-2.6.5-6.fc20 as
well as with fvwm built from latest CVS sources.

Martin

[Dominik Vogt]

Post by Martin Cermak
Which is a good news I think :) However, there is some issue with
the root window redrawing, which would be worth of fixing I guess.

No application whatsoever can do anything about that. Generating
the expose events and redrawing the root window is the
responsibility of the X server alone.

Ciao

Dominik ^_^ ^_^