gma500 suspend to ram fails (3.4)

[Alan Cox]

On Mon, 2 Jul 2012 07:06:59 +0900
Mattia Dongili <malattia at linux.it> wrote:

> On Thu, Jun 21, 2012 at 06:19:25AM +0900, Mattia Dongili wrote:
> > On Tue, Jun 19, 2012 at 07:56:52PM +0900, Mattia Dongili wrote:
> > > On Mon, Jun 18, 2012 at 10:04:00PM +0200, Patrik Jakobsson wrote:
> > > > On Sun, Jun 17, 2012 at 12:03 PM, Mattia Dongili
> > > > <malattia at linux.it> wrote:
> > ...
> > > > If possible, add drm.debug=7 to your boot line and send a dmesg
> > > > of 3.5-rc3.
> > > 
> > > attached the dmesg on rc3 with drm.debug=7.
> > > In addition I have a black screen and 3 modprobe processes stuck
> > > that udev tried to kill for a bit... then the console went blank
> > > and I can't tell if it's still trying:
> > > 
> > >   359 ?        R     11:08 /sbin/modprobe -b
> > > pci:v00008086d00008108sv0000104Dsd0000905Fbc03sc00i00
> > > 361 ?        D      0:00 /sbin/modprobe -b
> > > pci:v00008086d0000811Bsv0000104Dsd0000905Fbc04sc03i00
> > > 422 ?        D      0:00 /sbin/modprobe -b
> > > pci:v00008086d00008119sv0000104Dsd0000905Fbc06sc01i00
> > 
> > for the record, here below is where the screen flickers a bit and
> > booting gets stuck until udev starts trying to kill the modprobe
> > calls.
> 
> I gave 3.5-rc4 a try, no significant change but by comparing 3.4 and
> 3.5 logs I have this difference that may mean something:
> 
> [    0.000000] Linux version 3.5.0-rc4...
> [    5.712020] gma500 0000:00:02.0: Backlight lvds set brightness
> 74367436
> 
> while with 3.4
> 
> [    5.525296] gma500 0000:00:02.0: Backlight lvds set brightness
> 74407440
> 
> a did put some printks here and there and psb_driver_init seems to
> never return from gma_backlight_init.

Is it ok if you just comment out gma_backlight_init (at which point it
should just skip backlight handling and leave the firmware configured
one)

Alan