Re: Linux 2.6.12-rc2

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Thu, 2005-04-07 at 19:50 +0200, 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.
> 
> > > 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?

radeon_pll_errata_after_data() calls radeon_msleep() (it's in
radeonfb.h)

Ben.