Re: no backlight on radeon after recent kernel "upgrade"s

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Mon, 2007-02-19 at 00:04 -0800, Andrew Morton wrote:
> On Sun, 18 Feb 2007 23:46:16 -0500 Yaroslav Halchenko <[email protected]> wrote:
> > Since the most recent successful for me kernel 2.6.19-rc6-mm1, I've
> > tried few times to build more recent snapshots and now finally
> > 2.6.20-mm2. In all those cases I have a sad outcome -- kernel boots but
> > at some point during boot (few moments after Penguin icon in the top left
> > corner appears), light turns off... I still can see something, especially
> > if I light a strong flashlight at a sharp angle.
> > 
> > I've enabled back-light support and lcd support for those unsuccessful
> > kernels (with all backlight support features disabled kernel boots
> > ok and backlight shines as bright as always)
> > 
> > All my changes of values for files under
> > /sys/class/backlight/radeonbl0
> > had no impact on the screen. Also I had no files under /sys/class/lcd.
> > 
> > Running 
> > radeontool light off
> > caused complete turning off of LCD - I could not see
> > anything anymore.
> > 
> > sony's spictl -b had no effect as well.
> > 
> > Config can be found at
> > http://www.onerussian.com/Linux/bugs/nobacklight.1/config-2.6.20-mm2
> > lshw
> > http://www.onerussian.com/Linux/bugs/nobacklight.1/lshw
> > other details are available from
> > http://www.onerussian.com/Linux/bugs/nobacklight.1/
> > 
> > Could you please advise?
> 
> (cc's added)
> 
> Is 2.6.20 broken?  I assume the latest 2.6.20-gitN snapshot are failing..

It would be extremely useful to know which kernel versions you tested
and which ones failed. There are a number of backlight changes which are
just in 2.6.20-mm1 and -mm2 which it would be useful to rule out or
identify as the cause.

Also, do you normally see files under /sys/class/lcd?

Regards,

Richard


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

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux