qpainter "drawText() problem

[impeteperry]

Hi I have just installed linux on a new computer.
I am using Kubuntu 610 (and 704 on an another HD in the same box)
same problem on both installations .

I had intalled "g++" , "gliv, glutq3" ,"glut.doc" and nothing else before I Installed Qt4.
I did all the prescribed updates etc. I installed
Qt4-4.2.2 on the disk with 610
Qt4-4.2.3 on the disk with 704

Both installations were text book clean.

I have a graphic program which uses QPainter to draw lines and text on the screen.

when compiled on either disks , the lines draw fine, but the "p.drawText(int, int, QString);" command locks up the computer for a short time then kicks me out sets up the "User input" screen.

Now I have another computer that is also running Kubuntu 610 using "Qt-4.2.1" or "Qt-4.2.2, (not sure which) "Running the exact same program. It has no problem with the "p.drawText(int, int, QString);"

I used the same "tar" of the program on each installations, ran "qmake -project", added "CONFIG += opengl qt warn_on debug" in the generated ".pro" file. Ran "qmake foo.pro" and the "make".
No errors or significant warnings on any of the 3 installations.

If I optioned out the one "p.drawText(...)" line in the two new installations, everything everything else ran
the same on all three installations.

Am I missing some other packages?

I certainly would appreciate help, thanks

[wysota]

Do all the demos bundled with Qt work fine? If so, then the problem is probably within your application. Do you use threads? What does your ~/.xsession-errors contain (last few lines)?

[impeteperry]

Thanks , sorry about the delay
all the Demos run fine
I don't think I am using "threads"
I don't know how to get "~/.xsession-errors"

I have just tried to compile some of the examples and I get

pete@myComputer:/usr/local/Trolltech/Qt-4.2.3/examples/dialogs$ qmake dialogs.pro
Failure to open file: /usr/local/Trolltech/Qt-4.2.3/examples/dialogs/Makefile
Unable to generate makefile for: dialogs.pro
pete@myComputer:/usr/local/Trolltech/Qt-4.2.3/examples/dialogs$

I do have

PATH=/usr/local/Trolltech/Qt-4.2.3/bin:$PATH
        export PATH

PATH=/usr/local/Trolltech/Qt-4.2.3/bin:$PATH
        export PATH

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in my .bash_profile file.
so I must be missing something in my "Qt" installation.

My program generates "Makefile" files OK, however

Thank for any help and your patience with an old man.

[wysota]

I don't know how to get "~/.xsession-errors"

"less ~/.xsession-errors" - make sure to do it before you restart the X server.

I have just tried to compile some of the examples and I get I do have

PATH=/usr/local/Trolltech/Qt-4.2.3/bin:$PATH
        export PATH

PATH=/usr/local/Trolltech/Qt-4.2.3/bin:$PATH
        export PATH

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in my .bash_profile file.
so I must be missing something in my "Qt" installation.

Did you install Qt from an RPM?

[impeteperry]

Thanks
i ran the less... command and the first time through I got a request to install "kpersoni..." which I did and then ran the less.. command again and got

Xsession: X session started for pete at Sat Mar 24 09:32:30 EDT 2007
startkde: Starting up...
startkde: Running kpersonalizer...
X Error: BadDevice, invalid or uninitialized input device 167
Major opcode: 144
Minor opcode: 3
Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 167
Major opcode: 144
Minor opcode: 3
Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 167
Major opcode: 144
Minor opcode: 3
Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 167
Major opcode: 144
Minor opcode: 3
Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 167
Major opcode: 144
Minor opcode: 3
Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 167
Major opcode: 144
Minor opcode: 3
Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 167

I installed Qt as I always have by downloading it from the Trolltech "mirror", and then the "tar", "./configure -xshape", "make", "sudo make install" and entered the "path..." text item in my "profile" as instructed
All without errors of course.

[wysota]

Is that the last screen of errors from the file?

Try to see if you can install Qt using an rpm. This will make sure you have all needed dependencies.

Do I understand correctly that the X server crashes when you run the application?

[impeteperry]

yes it is. I shall try the "rpm" I will delete the present installation first.

[wysota]

You don't have to delete it, just make sure the RPM based one comes before the compiled one in your $PATH.

[impeteperry]

Thanks for all your help. I know I've been a pest.

i tried to find an RPM download. but gave up. (I really didn't spend too much time as I had so much trouble with RPM packages when I was using RH/Fedora before I switched to Ubuntu/Bubuntu.)

I did, however install a debian version of Qt4. and had even more problems.

I went back to my original thought and installed all the "gcc" packages that seemed reasonable.

Re-installed Qt4 from the downloaded source code.

Restarted my computer. re-compiled my program. NOW IT RUNS!!!

I went back to the installed Qt examples in /usr/local/Trolltech/examples and tried "qmake examples.pro" and got

pete@myComputer:/usr/local/Trolltech/Qt-4.2.3/examples$ qmake examples.pro
Failure to open file: /usr/local/Trolltech/Qt-4.2.3/examples/Makefile
Unable to generate makefile for: examples.pro
pete@myComputer:/usr/local/Trolltech/Qt-4.2.3/examples$

so now i want to fix that, but it is not criticca at this point.

Thanks again

I tried the examples in the Trolltech documentation . they all compiled and ran OK.

[wysota]

Do you have file access permissions for that directory? You may need to compile the example as root.

[impeteperry]

Do you have file access permissions for that directory? You may need to compile the example as root.

That did it, thanks