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    SubjectRe: Linux 2.6.12-rc2
    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


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