Bug#668828: Appears virtual desktop stays large regardless of efforts to limit.
On Die, 2012-04-17 at 13:11 -0500, Straight BolognaSandwich wrote:
> In Debian 7 Gnome Classic with the aforementioned "workaround 3" in
> place to get around display corruption, I see: xrandr -q
> Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 4096 x 4096
> DVI-I-2 connected 1280x1024+0+0 (normal left inverted right x axis y
> axis) 338mm x 270mm
> 1280x1024 60.0*+ 75.0
> 1152x864 75.0
> 1024x768 75.1 60.0
> 800x600 75.0 60.3
> 640x480 75.0 60.0
> 720x400 70.1
> Note the maximum is still showing 4096 x 4096 even though I've done
> all I can think of to limit it. I also can drag windows off my screen
> in all four directions.
That's normal, it would be up to the window manager to prevent this.
> IF I remotely understand what is going on, this could also present
> itself as poor video performance in addition to the display
> corruption. It appears that video memory is still being allocated for
> an area of 4096 x 4096.
No. With KMS, video memory is dynamically reallocated for the actual
current screen size, 1280x1024 in this case. That's why the hardware
limits can always be advertised for the maximum size.
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Debian, X and DRI developer