Skype UI going mad?! How to fix Qt?

[user5031858]

Well the problem begings today
my skype 2.x worked pretty well till this day stated to show spoiled UI.
I installed 4.0.x it shows the same rubbish:


I upgraded to latest kernel and so, did not help.
However I noticed that other programs using Qt graphical toolkit also stopped working (for example GoldenDict)

I beleive that problem in some config files of Qt which accumulated some wrong information about fonts and my screen resolution.
What may be fixed?

---------- Post added at 01:15 PM ---------- Previous post was at 12:15 PM ----------

The same happens wiht GUI of VirtualBox!

help! What is going on?

have already tried deleting Trolltech.conf
from everywhere...
And I am noticed that the problem appears undet different user-ids -- so the problem is not in local configuration

---------- Post added at 02:17 PM ---------- Previous post was at 01:15 PM ----------

tried to run qtconfig-qt4, result is the same:

[stevea]

Skype 4.0.0.7 works here,
That looks like maybe a localization issue, but qt is not my forte'.
Skype->Options->General is worth a look, for language and layout options.
You might want to remove the skype user config directory (~/.config/Skype/) if you had an older veriosn installed.

Hate some closed source today !!

[user5031858]

Originally Posted by stevea

Skype 4.0.0.7 works here,
That looks like maybe a localization issue, but qt is not my forte'.
Skype->Options->General is worth a look, for language and layout options.
You might want to remove the skype user config directory (~/.config/Skype/) if you had an older veriosn installed.

Hate some closed source today !!

Thank you, but not it is not the case... All Qt dependent applications got mad.
Deleted ~/.Skype and all other stuff related Qt
UI is so bad that I even cannot go thru menus and dialogs... (even accepting User Agreement in skype) Pretty hell
Luckily I have CentOS on the second machine

---------- Post added at 11:29 PM ---------- Previous post was at 04:29 PM ----------

OMG!
It disappeared once I got home.
Absolutely unexplainable...
However I suspect one piece of software that may interfere into Qt configuration, it is IBM Integration Desingner -- I suspect that they mixed SWT, XUL and Qt usage in one Eclipse-based product... I hope I wrong since SWT + XUL is absolute hell... and adding here Qt even worse... But how process running under non-root user may spoil configuration of Qt for all users :?

[stevea]

So you had these clues, you didn't bother to mention them,
http://forums.fedoraforum.org/showthread.php?t=282819

The answer is that skype v4 mostly works out of the box with Fedora QT and you buggered it up somehow.

[user5031858]

Originally Posted by stevea

The answer is that skype v4 mostly works out of the box with Fedora QT and you buggered it up somehow.

Alas, I was wrong suspecting IBM software in breaking Qt. Today I started machine and got the same problem... Also I tried to run from console.
qtconfig-qt4

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
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
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

google search by QNativeImage: Unable to attach to shared memory segment.
result in https://bugreports.qt-project.org/br...REATORBUG-7315 and https://bugreports.qt-project.org/browse/QTBUG-7702

I understand little from these descriptions... if not nothing...

---------- Post added at 11:49 AM ---------- Previous post was at 11:18 AM ----------

OMG!!! OMG!!!
Eureka!!!
I installed IBM DB2 recently on my machine
I did changed /etc/sysctl.conf

kernel.shmmni=4096 
kernel.shmmax=4294967296 
kernel.shmall=8388608 
#kernel.sem=<SEMMS><SEMMNS><SEMOPM><SEMMNI> 
kernel.sem=250 256000 32 4096 
kernel.msgmni=16384 
kernel.msgmax=65536 
kernel.msgmnb=65536

now I found strong correlation between running DB2 instance and Qt.

If I boot and did not start DB2 instance, qtconfig-gt4 (Qt based application itself) starts with that strange "QNativeImage: Unable to attach to shared memory segment. "
Once I started DB2 instace (using db2start -- I guess at this point DB2 starts consuming memory and resources) and then run qtconfig-qt4 -- it runs successfully, skype runs, IBM Lotus Notes runs, GoldenDict runs... i.e. eventually all software that is Qt-based. I guessed that by providing these settings I let more sharred memory for all... How may it influence Qt so badly?

I have 8GB 32-bit PAE, could anybody, please, critisize my /etc/sysctl.conf settings since the root of problems it here?

---------- Post added at 06:12 PM ---------- Previous post was at 11:49 AM ----------

so finally end this problem with

kernel.shmmax=2147483648

probably specifiing more for 32-bit PAE system is nonsense, however other applications were doing well.