[ltp] LCD stays off in X

[Alex Deucher]

On 6/10/07, Richard Neill <rn214@hermes.cam.ac.uk> wrote:
>
>
> Rob Hess wrote:
> > Hi,
> >     I have a T60 with the Gentoo-patched 2.6.20 kernel and fglrx
> > 8.37.6.  Since I've upgraded to 2.6.20, I've noticed that, under X,
> > the LCD will not come back on after it goes off.  For example, if I
> > just boot the computer, but let it sit on the login screen for a
> > while, the lcd goes off and stays off.  I can switch to the console,
> > and then the LCD comes back on, but I can never go back to X, even if
> > I restart XDM, reload the fglrx module, etc.
> >     I am not quite sure where to begin looking to solve this problem.
> > Can anyone offer advice?
>
> Does `radeontool light on` help at all? Or, can you get any mileage out
> of xset  (remember to export DISPLAY) ?
>
> Also, to bisect the problem - can you reproduce with the new xserver,
> but old kernel? Or the current kernel + vesa driver?  Does temporarily
> restarting the X server with the vesa driver help?

radeontool is useless on avivo based radeons.  The display control
register layout is completely different.

Alex