Re: Linux 2.6.12-rc2

Moritz Muehlenhoff
2005-04-07T17:50:43Z

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.

> > 2. I'm using fbcon as my primary work environment, but tty switching has
> > become _very_ sloppy, it's at least a second now, while with 2.6.11 it
> > was as fast as a few ms. Is this caused by the "proper PLL accesses"?
>
> Yes. Unfortunately. It's surprised it is that slow though, there
> shouldn't be more than 5 or 6 PLL accesses on a normal mode switch, with
> 5ms pause for each, that should still be very reasonable. It looks like
> we are doing a lot more accesses which I don't completely understand.

Can you tell me which function you have in mind, so that I can insert
some printks to see how often it's called?

Cheers,
Moritz