Re: Linux 2.6.12-rc2

[Nish Aravamudan <nish.aravamudan@gmail.com>]

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On Apr 7, 2005 10:50 AM, Moritz Muehlenhoff <jmm@inutil.org> 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.

FWIW, I have the same problem on a T41p with 2.6.11 and 2.6.12-rc2,
except that neither returns from suspend-to-ram with video restored on
the LCD. I believe I was able to get video restored on an external CRT
in either 2.6.12-rc2 or 2.6.12-rc2-mm1, but the LCD still didn't
restore (can verify later today, if you'd like). I had dumped out the
radeontool regs values before & after the sleep, in case they help.
They are attached.

I posted these problems in the "Call for help S3" thread, but no one responded.

Thanks,
Nish

[-- Attachment #2: radeontool_pre --]
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RADEON_DAC_CNTL=ff002102
RADEON_DAC_CNTL2=00000000
RADEON_TV_DAC_CNTL=07770142
RADEON_DISP_OUTPUT_CNTL=10000008
RADEON_CONFIG_MEMSIZE=08000000
RADEON_AUX_SC_CNTL=00000000
RADEON_CRTC_EXT_CNTL=0d008048
RADEON_CRTC_GEN_CNTL=03000200
RADEON_CRTC2_GEN_CNTL=00800000
RADEON_DEVICE_ID=00004e54
RADEON_DISP_MISC_CNTL=5b300600
RADEON_GPIO_MONID=00000000
RADEON_GPIO_MONIDB=00000000
RADEON_GPIO_CRT2_DDC=00000000
RADEON_GPIO_DVI_DDC=00000300
RADEON_GPIO_VGA_DDC=00000300
RADEON_LVDS_GEN_CNTL=003cffa1

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RADEON_DAC_CNTL=ff002102
RADEON_DAC_CNTL2=00000000
RADEON_TV_DAC_CNTL=00770103
RADEON_DISP_OUTPUT_CNTL=1000000a
RADEON_CONFIG_MEMSIZE=08000000
RADEON_AUX_SC_CNTL=00000000
RADEON_CRTC_EXT_CNTL=00000048
RADEON_CRTC_GEN_CNTL=03000200
RADEON_CRTC2_GEN_CNTL=02000000
RADEON_DEVICE_ID=00004e54
RADEON_DISP_MISC_CNTL=5b300600
RADEON_GPIO_MONID=00000000
RADEON_GPIO_MONIDB=00000000
RADEON_GPIO_CRT2_DDC=00000000
RADEON_GPIO_DVI_DDC=00000300
RADEON_GPIO_VGA_DDC=00000300
RADEON_LVDS_GEN_CNTL=080c0089