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SubjectRe: Linux 2.6.12-rc2
On Apr 7, 2005 10:50 AM, Moritz Muehlenhoff <> wrote:
> Benjamin Herrenschmidt wrote:
> > > 1. When resuming from S3 suspend and having switched off the backlight
> > > with radeontool the backlight isn't switched back on any more.
> >
> > I'm not sure what's up here, it's a nasty issue with backlight. Can
> > radeontool bring it back ?
> Before suspending I power down the backlight with "radeontool light off"
> and with 2.6.11 the display is properly restored. With 2.6.12rc2 the
> backlight remains switched off and if I switch it on with radeontool it
> becomes lighter, but there's still no text from the fbcon, just the blank
> screen.

FWIW, I have the same problem on a T41p with 2.6.11 and 2.6.12-rc2,
except that neither returns from suspend-to-ram with video restored on
the LCD. I believe I was able to get video restored on an external CRT
in either 2.6.12-rc2 or 2.6.12-rc2-mm1, but the LCD still didn't
restore (can verify later today, if you'd like). I had dumped out the
radeontool regs values before & after the sleep, in case they help.
They are attached.

I posted these problems in the "Call for help S3" thread, but no one responded.

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