Re: gnome_shell crash when connecting a second monitor on a ThinkPad T60

[Adam Jackson <ajax redhat com>]

On Fri, 2013-07-19 at 13:03 +0200, drago01 wrote:
> On Fri, Jul 19, 2013 at 5:26 AM, Dave Johansen <davejohansen gmail com> wrote:
> > Please let me know if there's a more appropriate list to post this on,
> > but from examining the list of options this seemed like the most
> > appropriate one.
> >
> > I just upgraded my ThinkPad T60 from CentOS 6 to Fedora 19 and
> > whenever I connect it to the dock with a second VGA monitor connected
> > to the dock, gnome_shell crashes. This worked fine under CentOS 6 and
> > the keyboard and mouse continue to work, but I can't do anything with
> > the shell.
>
> The problem is  that you are over the texture size limit of your GPU:
>
> glxinfo -l | grep GL_MAX_TEXTURE_SIZE
>
> (should be 2048 in your case). So your combined res cannot be wider
> then 2048 in either direction).
>
> Adding the second monitor exceeds the limit.

The problem is also that we're setting a root window property containing
that limit, and simply not looking at its value.

ergine:~/git/gnome-settings-daemon% xprop -root | grep _GNOME_MAX_SCREEN_SIZE
_GNOME_MAX_SCREEN_SIZE(CARDINAL) = 8192
ergine:~/git/gnome-settings-daemon% git grep -c _GNOME_MAX_SCREEN_SIZE       
ergine:~/git/gnome-settings-daemon% 

- ajax