Re: mga dualhead console + gpm = instant reboot

From: Petr Vandrovec (
Date: Sat Jun 14 2003 - 18:01:25 EST

On Sat, Jun 14, 2003 at 05:50:01PM -0500, Ryan Underwood wrote:
> On Sat, Jun 14, 2003 at 11:41:14PM +0200, Petr Vandrovec wrote:
> > On Fri, Jun 13, 2003 at 08:42:12PM -0500, Ryan Underwood wrote:
> > > Hello,
> > >
> > > I run the mga dualhead console. It works ok for the most part (some
> > > strange behavior on the second head happens that can be noticed in e.g.
> > > lynx when the cursor is blinking). However, if I move the gpm mouse on
> > > the first head, switch to a console on the second head, move gpm mouse
> > > again, then switch back to a console on the first head, moving the mouse
> > > thereafter results in an instant reboot of the system.
> > >
> > > Since there does not appear to be any kernel panic or oops, I am at a
> > > loss how to track the problem down. Any ideas?
> >
> > Kernel version? And if it is 2.4.x, did you boot with
> > 'video=scrollback:0' ? If not, then please do so...
> Sorry, fresh 2.4.21, but it has happened on previous 2.4 kernels too. I
> will look into the scrollback option. What does that accomplish with
> respect to the mouse cursor?

It stops code from using software scrollback, which is common for both
heads, and which can corrupt memory if screen size on both /dev/fb* differs.

Maybe it wont help, but scrollback is known problem, so lets rule this
one out first.

I'll try to build some 2.4.x kernel on monday, but I assume that I would
notice such reboot during regular usage of dualhead system, as in the past
I was using 2.4.x...
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This archive was generated by hypermail 2b29 : Sun Jun 15 2003 - 22:00:40 EST