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Old 03-15-2010, 05:06 PM   #1
reader42
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Segmentation Fault after Qt upgrade

I'm running a Kubuntu 9.10 here using calibre 0.6.13 package.

After upgrading Qt (from 4.5.3really4.5.2-0ubuntu1 to 4.6.2-0ubuntu1~karmic1~ppa2) I get a Segmentation Fault when starting calibre:

Code:
$ calibre
link  hasn't been detected!
link  hasn't been detected!
Segmentation fault
I tried to rebuild the package against the new Qt-version. The build suceeds but the problem is still there.
Any ideas how to fix this?
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Old 03-20-2010, 04:16 AM   #2
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No ideas?
Can someone tell me, how to get a traceback?
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Old 03-20-2010, 05:47 AM   #3
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use the binary calibre install from the calibre website, it bundles its own Qt. I have nothing to do with the Ubuntu calibre port, so I can't really help with Ubuntu specific issues.
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Old 03-20-2010, 07:58 AM   #4
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Quote:
Originally Posted by kovidgoyal View Post
use the binary calibre install from the calibre website, it bundles its own Qt. I have nothing to do with the Ubuntu calibre port, so I can't really help with Ubuntu specific issues.
Well, I'm using binary install (version 0.6.45) on Ubuntu, and since yesterday's update of the Ubuntu Linux kernel to the version:

$ uname -a
Linux XXXXXXX 2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12 05:23:09 UTC 2010 i686 GNU/Linux

Calibre segfaults in the same way when I plug in the Sony Reader (PRS-600).

Whan I run Calibre on the command line with the Sony reader plugged in, even with -v option, only following is printed:

$ ./calibre -v
link hasn't been detected!
link hasn't been detected!
Segmentation fault

(Note that after 'link' lines, Calibre's window appears, and it breafly tells that Sony reader is detected, but after 2 sec. the window disappears as Calibre segfaults.)

When I run Calibre without Sony reader pluged in, it starts normally and does not crash.

So I don't think this is related to QT update, it is more likely related to the Ubuntu Linux kernel update.

I will try to reboot to previous kernel version and see what happens.
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Old 03-20-2010, 12:01 PM   #5
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I have the exact same Ubuntu version shown and 6.45 does NOT fault with my Astak PP
Getting a good 6.45 file was a nightmare. I finally got the bz2 from Sourceforge.

Good luck
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Old 03-21-2010, 04:08 PM   #6
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I did some debugging:

The segmentation fault occurs, when the function recount of the class TagsView is called. This
Code:
self.scrollTo(ci, QTreeView.PositionAtTop)
is the line that causes the sefault. When I remove it, the program seems to work fine.
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Old 03-21-2010, 04:45 PM   #7
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What did you do to trigger the segfault?
I can try it here.
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Old 03-21-2010, 04:57 PM   #8
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Just starting the program triggers the segfault.
I think it has something to do with the Qt-Version, because it occurs since I updated Qt.
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Old 03-21-2010, 06:58 PM   #9
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Quote:
Originally Posted by reader42 View Post
Just starting the program triggers the segfault.
I think it has something to do with the Qt-Version, because it occurs since I updated Qt.
Got to love software support problems
6.45 on Ubuntu 9.10 32 bit (Intel)
Attached reader to USB Cable
Started Calibre.

It detects my reader (Astak PP ) and SD card perfectly
QT is 4.5.3 really...
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