Removing the -xshm switch when executing the VM fixes this bug, which has to do with some kind of issue with the use of X shared memory extensions and compiz.
https://bugs.launchpad.net/ubuntu/+source/scratch/+bug/1025013 On Tue, Jul 24, 2012 at 1:51 PM, Amos Blanton <[email protected]> wrote: > Previously I thought this bug only happened on 64 bit installations of > Scratch, but we've since seen it on 32 bit installations as well. It > appears to happen only in Ubuntu's 12.04's (normal) 3d mode. If I login in > 2d mode, window Scratch's window resizes just fine on my machine. > > I've filed a bug against Scratch in Ubuntu. > > https://bugs.launchpad.net/ubuntu/+source/scratch/+bug/1028562 > > > > On Thu, Jun 7, 2012 at 8:50 AM, Bert Freudenberg <[email protected]>wrote: > >> >> On 07.06.2012, at 14:44, Amos Blanton wrote: >> >> The shrinking only happens on my 64 bit system (12.04 LTS). Any resizing >> of the window (larger or smaller) triggers it. >> >> You mentioned earlier that there were outstanding issues with ia64, so >> it's not too surprising. Actually - so far this and problems with the >> pulse-audio plugin are the only issues I've encountered running Scratch on >> the 64 bit VM. Seems quite promising! >> >> >> You might want to check the resizing math. IIRC the VM tries to snap the >> window width to the next multiple of 4. Maybe that is not stable if a word >> is not 4 but 8 bytes long. >> >> - Bert - >> >> On Thu, Jun 7, 2012 at 8:16 AM, Bert Freudenberg <[email protected]>wrote: >> >>> >>> On 05.06.2012, at 21:49, Amos Blanton wrote: >>> >>> > On Tue, Jun 5, 2012 at 2:45 PM, Bert Freudenberg <[email protected]> >>> wrote: >>> > >>> >> What was the Squeak display size before resizing? (print Display) >>> > >>> > wmctrl says it's: 1024 x 767. >>> >>> That's odd ;) >>> >>> >> What's your screen resolution, graphics card, and window manager? >>> > >>> > My laptop is docked, driving a display at 1680 x 1050 via hdmi, and >>> its normal screen (1366 x 768), is turned off. >>> > >>> > Graphics card: >>> > 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation >>> Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 >>> [VGA controller]) >>> > Subsystem: Lenovo Device 21da >>> > >>> > Window Manager must be Unity/Gnome/ Compiz, or whatever is standard on >>> Ubuntu 12.04. >>> > >>> > I should note that the testing I did on 32bits Ubuntu 12.04 was done >>> in Virtualbox VM, using Miry's latest package: >>> http://aula.edu.es/pool/main/s/scratch/ >>> >>> I do not see the shrinking problem in Virtual Box using Ubuntu 12.04 LTE >>> 32 bits, fully updated. How exactly would I have to resize to trigger that? >>> >>> I DO see the black window problem when clicking the maximize button in >>> the window title bar. It also happens in Etoys (see >>> http://tracker.squeakland.org/browse/SQ-400 ). >>> >>> - Bert - >>> >>> >>> >> >> >
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