Bug#396071: segfaults when attempting to take a screenshot while wget is running

[Robert Millan <rmh@aybabtu.com>]

On Sun, Oct 29, 2006 at 09:14:57PM +0100, Attilio Fiandrotti wrote:
> Frans Pop wrote:
> >reassign 396071 cdebconf-gtk-udeb
> >thanks
> >
> >On Sunday 29 October 2006 17:23, Robert Millan wrote:
> >
> >>If you hit the Screenshot button while wget is fetching [1] your
> >>mirror's Release file, d-i will segfault.  Inmediately after that, you
> >>see [2], and after a console switch, the d-i logs [3].
> >
> >
> >Known issue and the reason why the screenshot button is disabled when a 
> >progress bar is running.
> >Apparently we are disabling the screenshot button too late here.
> >
> >Reassigning to cdebconf-gtk-udeb as that is what causes the crash, and it 
> >would be good to investigate the actual cause of the crash and seeing if 
> >we can solve that. Disabling the button was only a workaround.
> >
> >Note that in the mean time we may need to fix this in choose-mirror after 
> >all by displaying a progress bar at this point.
> 
> Accessing the GdkWindow by a thread while the window is being updated by 
> another thread in the gtk_main_loop() causes crashes, and this is the 
> reason why i made the screenshot button disappear during a 
> progress_xxx() call, in fact past experiments aimed at gaining exclusive 
> access to the gdkwidow led to deadlocks between threads.
> Robert, did you press the button before the progressbar was displayed or 
> were you able to press it while the progressbar was running?

When I pressed it no progress bar was being displayed.  I don't know if one was
going to show up eventualy, but it was taking too much time and in fact the
system appeared to be hang because of this.

-- 
Robert Millan

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