after starting a wireframe shows up, and then a high I/O-load occurs, memory is consumed up to 90%, X-Windows gets completely unusable (freezes), but changing to console (ctrl-alt-f1) is possible - 20-40s after pressing the keys - and instantly I/O-load drops to zero as switching to console happens.
Therefore I think this may be a problem with QT or even X-Windows itself.
There are some errors printed by picard/QT/X-Windows on the running terminal:
(python:5103): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion `GTK_IS_WIDGET (widget)' failed
{Comment: dozens of that}
QWidget::setMinimumSize: (/MainWindow) The largest allowed size is (16777215,16777215)
{Comment: some of that}
QNativeImage: Unable to attach to shared memory segment.
X Error: BadDrawable (invalid Pixmap or Window parameter) 9
Major opcode: 62 (X_CopyArea)
Resource id: 0x0
X Error: BadDrawable (invalid Pixmap or Window parameter) 9
Major opcode: 62 (X_CopyArea)
Resource id: 0x0
{Comment: these are the last lines of the log - after that everything freezes}
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: picard 1.0-1
ProcVersionSignature: Ubuntu 3.5.0-14.18-generic 3.5.3
Uname: Linux 3.5.0-14-generic i686
ApportVersion: 2.5.1-0ubuntu7
Architecture: i386
Date: Sat Sep 15 13:11:43 2012
ExecutablePath: /usr/lib/picard/run
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha i386 (20120724.2)
InterpreterPath: /usr/bin/python2.7
ProcEnviron:
TERM=xterm
SHELL=/bin/bash
PATH=(custom, no user)
LANG=de_DE.UTF-8
SourcePackage: picard
UpgradeStatus: No upgrade log present (probably fresh install)
iotop-snapshot:
Total DISK READ: 13.58 M/s | Total DISK WRITE: 0.00 B/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
1190 be/4 root 10.86 M/s 0.00 B/s 82.75 % 0.00 % X :0 -core -auth /var/run/
(Do I see right, X _reads_ all the time from swap?!? )