Unity

Bug #862455
Comment #2

Comment 2 for bug 862455

Revision history for this message

Sam Spilsbury (smspillaz) wrote on 2012-12-28: Re: [Bug 862455] Re: Applications that create absurdly large windows can break the desktop

Having a huge black window on-screen is probably worse than hiding the
window. There's some other side effects of having large pixmaps too.

This happens on all versions. Its a limitation in the way tfp was designed.

Either that or ubuntu should enable the copytex plugin. Its been
sitting in the source tree for a while ..

On Fri, Dec 28, 2012 at 10:56 AM, madbiologist
<email address hidden> wrote:
> What version of Ubuntu is this happening on? And what hardware and
> graphics driver/s? If it is ocurring with the radeon driver it might be
> solved by this upstream commit to xf86-video-ati
>
> author Jerome Glisse 2012-11-14 17:15:47 (GMT)
> committer Jerome Glisse 2012-11-15 17:07:11 (GMT)
> commit 53af6aa99dfb67b5223c28d5129a79694165048d
> tree 755367c6ee44895f1c5296ff802c502f680041b9
>
> radeon: avoid segfault when pixmap exceed GPU capabilities
>
> We might get a request for a pixmap/drawable that is too big
> for GPU capabilities in the dri2 get buffer path. In face of
> such things just return NULL to dri2 get buffer request. The
> GL driver should then use something like transparent black to
> avoid something too ugly on the screen.
>
> Signed-off-by: Jerome Glisse
> Reviewed-by: Michel Dänzer
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/862455
>
> Title:
> Applications that create absurdly large windows can break the desktop
>
> Status in Unity:
> Triaged
> Status in “unity” package in Ubuntu:
> Triaged
>
> Bug description:
> The window fails to bind to a texture because it is absurdly large. X
> also slows to a crawl. What is happeneing
>
> 1) Window fails to bind so the user gets left with garbage on their screen
> 2) The decorator can't handle pixmap type decorations for windows > mts, so it switches to 2D mode temporarily, but this is not maintained or supported
> 3) Things on the desktop start to crash
>
> As a workaround until we can
>
> 1) Merge in the new decorator which isn't broken in 2D Mode
> 2) Enable copytex
>
> We should just hide these windows and prevent them from causing
> trouble. In that case compiz will warn.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/unity/+bug/862455/+subscriptions

--
Sam Spilsbury

Having a huge black window on-screen is probably worse than hiding the
window. There's some other side effects of having large pixmaps too.

This happens on all versions. Its a limitation in the way tfp was designed.

Either that or ubuntu should enable the copytex plugin. Its been
sitting in the source tree for a while ..

On Fri, Dec 28, 2012 at 10:56 AM, madbiologist
<862455@bugs.launchpad.net> wrote:
> What version of Ubuntu is this happening on?  And what hardware and
> graphics driver/s?  If it is ocurring with the radeon driver it might be
> solved by this upstream commit to xf86-video-ati
>
> author Jerome Glisse 2012-11-14 17:15:47 (GMT)
> committer Jerome Glisse 2012-11-15 17:07:11 (GMT)
> commit 53af6aa99dfb67b5223c28d5129a79694165048d
> tree 755367c6ee44895f1c5296ff802c502f680041b9
>
> radeon: avoid segfault when pixmap exceed GPU capabilities
>
> We might get a request for a pixmap/drawable that is too big
> for GPU capabilities in the dri2 get buffer path. In face of
> such things just return NULL to dri2 get buffer request. The
> GL driver should then use something like transparent black to
> avoid something too ugly on the screen.
>
> Signed-off-by: Jerome Glisse
> Reviewed-by: Michel Dänzer
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/862455
>
> Title:
>   Applications that create absurdly large windows can break the desktop
>
> Status in Unity:
>   Triaged
> Status in “unity” package in Ubuntu:
>   Triaged
>
> Bug description:
>   The window fails to bind to a texture because it is absurdly large. X
>   also slows to a crawl. What is happeneing
>
>    1) Window fails to bind so the user gets left with garbage on their screen
>    2) The decorator can't handle pixmap type decorations for windows > mts, so it switches to 2D mode temporarily, but this is not maintained or supported
>    3) Things on the desktop start to crash
>
>   As a workaround until we can
>
>    1) Merge in the new decorator which isn't broken in 2D Mode
>    2) Enable copytex
>
>   We should just hide these windows and prevent them from causing
>   trouble. In that case compiz will warn.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/unity/+bug/862455/+subscriptions

-- 
Sam Spilsbury