[Bug 11050] New: Wine hangs on machines with Via Unichrome graphics

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=11050

           Summary: Wine hangs on machines with Via Unichrome graphics
           Product: Wine
           Version: 0.9.52.
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: wine-x11driver
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: karllinuxtest.relton at ntlworld.com


Wine appears to be hanging and freezing X11 in Ubuntu Gutsy distribution on
machines with Via Unichrome graphics.

Even running wineprefixcreate is enough to cause the problem - needless to say
trying wine with any executable (e.g. notepad) then gives the same symptoms.

Wine hangs, and the X11 freezes (no mouse movement, no keyboard response). The
machine itself is okay - one can ssh in and kill the offending process which
then unfreezes X.


The offending process is rundll32.exe - which sits at 99% CPU.

Looking at Ubuntu forums, several other people have hit the same problem: see
http://ubuntuforums.org/archive/index.php/t-584308.html

This happens on my PC with Via Unichrome graphics, my other two PCs (Nvidia and
Intel graphics) are fine.


I backtracked my install of wine all the way to the Feisty shipped version
(0.9.33), and it has the same problem. This suggests some interaction between
the graphics libraries in Gutsy and wine that was not present in previous
releases.

I'll attach a log with +relay. In that you will see there is a page fault (line
27514), starting debugger ...
The final couple of lines in the log I think occur when I kill the runaway
rundll32.exe process.


If I hide the winex11.drv.so file so that wine cannot load it, then
wineprefixcreate will complete correctly and wine can be used ... but of course
in text mode only! This confirms some interaction with the graphics that seems
only present when X11 is running its 'via' driver.

I am happy to try and help debug - but would appreciate pointers of what I
should do next, e.g. what channels to enable.


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