Re: Linux 2.6.12-rc2

From: Moritz Muehlenhoff (jmm_at_inutil.org)
Date: 04/07/05

  • Next message: Bartlomiej Zolnierkiewicz: "Re: Kernel SCM saga.." 
    Date:	Thu, 7 Apr 2005 19:50:26 +0200
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>

    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
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

  • Next message: Bartlomiej Zolnierkiewicz: "Re: Kernel SCM saga.."

    Relevant Pages

    • Re: Linux 2.6.12-rc2
      ... >> I'm not sure what's up here, it's a nasty issue with backlight. ... > backlight remains switched off and if I switch it on with radeontool it ... but the LCD still didn't ... send the line "unsubscribe linux-kernel" in ...
      (Linux-Kernel)
    • Re: Call for help: list of machines with working S3
      ... Pavel Machek wrote: ... too but does not switch off the ... backlight and looks "interesting", but does not crash. ... send the line "unsubscribe linux-kernel" in ...
      (Linux-Kernel)
    • Re: Linux 2.6.12-rc2
      ... >> backlight remains switched off and if I switch it on with radeontool it ... > radeontool regs values before & after the sleep, ... send the line "unsubscribe linux-kernel" in ...
      (Linux-Kernel)
    • Re: Linux 2.6.12-rc2
      ... >> I'm not sure what's up here, it's a nasty issue with backlight. ... > backlight remains switched off and if I switch it on with radeontool it ... send the line "unsubscribe linux-kernel" in ...
      (Linux-Kernel)
    • Re: Toshiba Satellite P25-S507 -- Question
      ... All laptops have a switch that detects whether the lid is closed (so they can shut down the screen backlight to save power and heat when the screen is closed anyway). ...
      (comp.sys.laptops)