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Old 01-13-2012, 03:27 PM
Marius Gedminas
 
Default Intel GM956 performance regression in 11.10?

Has anyone else noticed a considerable performance regression in Intel
GM956 graphics after an upgrade from 11.04 to 11.10?

When I drag terminal windows around on my screen the position updates at
what feels like ~6 fps. The compiz workspace sliding animation on
Ctrl+Alt+Left/Right sometimes drops *all* the intermediate frames. I can
sometimes see *tearing* when I'm scrolling text in less in a
gnome-terminal!

I use Unity (and have used in in 11.04).

Marius Gedminas
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Old 01-16-2012, 02:16 PM
Marius Gedminas
 
Default Intel GM956 performance regression in 11.10?

On Fri, Jan 13, 2012 at 06:27:06PM +0200, Marius Gedminas wrote:
> Has anyone else noticed a considerable performance regression in Intel
> GM956 graphics after an upgrade from 11.04 to 11.10?
>
> When I drag terminal windows around on my screen the position updates at
> what feels like ~6 fps. The compiz workspace sliding animation on
> Ctrl+Alt+Left/Right sometimes drops *all* the intermediate frames. I can
> sometimes see *tearing* when I'm scrolling text in less in a
> gnome-terminal!

A reboot fixes this and Compiz animations/application updates feel fast
again.

What could possibly cause a gradual slowdown of graphics?

Marius Gedminas
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Old 01-16-2012, 02:47 PM
Ioannis Vranos
 
Default Intel GM956 performance regression in 11.10?

On Mon, Jan 16, 2012 at 5:16 PM, Marius Gedminas <marius@pov.lt> wrote:
> On Fri, Jan 13, 2012 at 06:27:06PM +0200, Marius Gedminas wrote:
>> Has anyone else noticed a considerable performance regression in Intel
>> GM956 graphics after an upgrade from 11.04 to 11.10?
>>
>> When I drag terminal windows around on my screen the position updates at
>> what feels like ~6 fps. The compiz workspace sliding animation on
>> Ctrl+Alt+Left/Right sometimes drops *all* the intermediate frames. I can
>> sometimes see *tearing* when I'm scrolling text in less in a
>> gnome-terminal!
>
> A reboot fixes this and Compiz animations/application updates feel fast
> again.
>
> What could possibly cause a gradual slowdown of graphics?

It may be a graphics card overheating problem. Is there available the
GPU temperature?

It may also be a driver bug. After checking the GPU temperature, try
using the latest driver.


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Old 01-16-2012, 06:19 PM
Marius Gedminas
 
Default Intel GM956 performance regression in 11.10?

On Mon, Jan 16, 2012 at 05:47:48PM +0200, Ioannis Vranos wrote:
> On Mon, Jan 16, 2012 at 5:16 PM, Marius Gedminas <marius@pov.lt> wrote:
> > On Fri, Jan 13, 2012 at 06:27:06PM +0200, Marius Gedminas wrote:
> >> Has anyone else noticed a considerable performance regression in Intel
> >> GM956 graphics after an upgrade from 11.04 to 11.10?
> >>
> >> When I drag terminal windows around on my screen the position updates at
> >> what feels like ~6 fps. The compiz workspace sliding animation on
> >> Ctrl+Alt+Left/Right sometimes drops *all* the intermediate frames. I can
> >> sometimes see *tearing* when I'm scrolling text in less in a
> >> gnome-terminal!
> >
> > A reboot fixes this and Compiz animations/application updates feel fast
> > again.
> >
> > What could possibly cause a gradual slowdown of graphics?
>
> It may be a graphics card overheating problem.

I do not think rebooting would make it suddenly cooler, would it?

> Is there available the GPU temperature?

Maybe. Judging from the fan speed overheating was not a problem.

> It may also be a driver bug. After checking the GPU temperature, try
> using the latest driver.

Do you mean xserver-xorg-video-intel, or the kernel bits, or the Mesa
bits? Is there a PPA with newer driver versions for oneiric?

I wish there was a way to reproduce this faster than by using the laptop
for a week after each boot.

Marius Gedminas
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