x3100 resume results in black screen (2.6.25 kernel)

[Jie Luo]

Khashayar Naderehvandi wrote:
>
>
> On Fri, May 9, 2008 at 11:23 PM, Jesse Barnes 
> <jbarnes at virtuousgeek.org <mailto:jbarnes at virtuousgeek.org>> wrote:
>
>     On Friday, May 09, 2008 1:14 pm Khashayar Naderehvandi wrote:
>     > On Fri, May 9, 2008 at 10:03 PM, Jesse Barnes
>     <jbarnes at virtuousgeek.org <mailto:jbarnes at virtuousgeek.org>>
>     >
>     > wrote:
>     > > On Friday, May 09, 2008 12:41 pm Khashayar Naderehvandi wrote:
>     > > > On 5/9/08, Jesse Barnes <jbarnes at virtuousgeek.org
>     <mailto:jbarnes at virtuousgeek.org>> wrote:
>     > > > > On Friday, May 09, 2008 10:05 am Khashayar Naderehvandi wrote:
>     > > > > > Running ubuntu hardy with a 2.6.25 kernel causes the
>     backlight of
>     > > > > > my
>     > > > >
>     > > > > laptop
>     > > > >
>     > > > > > to remain black after resume. Switching VTs does not help.
>     > > > > >
>     > > > > > Hardy ships with a 2.6.24 kernel which works just fine,
>     I installed
>     > > > > > a 2.6.25 kernel since it causes far fewer wakeups (as
>     observed with
>     > > > > > powertop).
>     > > > > >
>     > > > > > I have also tried the 2.6.24 kernel with drm modules
>     from git. This
>     > > > > > also fails on resume.
>     > > > > >
>     > > > > > The laptop is a dell xps m1330 with an x3100 chipset.
>     > > > >
>     > > > > Does a suspend/resume from the console after loading the
>     i915 DRM
>     > >
>     > > driver
>     > >
>     > > > > fail
>     > > > > in the same way?
>     > > > >
>     > > > >
>     > > > > No, that works just fine.
>     > >
>     > > Ok, so the console always comes back correctly if you suspend
>     from the
>     > > console... that's a start.  Are you using vesafb, intelfb,
>     uvesafb or any
>     > > other framebuffer drivers?
>     >
>     > Not as far as I know, but here's an output of lsmod | grep fb
>     >
>     > fbcon                  42912  0
>     > tileblit                3456  1 fbcon
>     > font                    9472  1 fbcon
>     > bitblit                 6784  1 fbcon
>     >
>     > > > In fact, resume works fine sometimes (well, it worked at
>     least once),
>     > > > but most of the time it fails. I tried to get it working
>     some more
>     > > > using the 2.6.24 kernel with updated drm and i915 modules. What
>     > > > happens, more exactly, is that upon resume the only thing
>     that comes
>     > > > back is the
>     > >
>     > > cursor.
>     > >
>     > > > I can move the cursor around but I can't change VTs, neither
>     can I
>     > >
>     > > restart
>     > >
>     > > > the X server with ctrl-alt-backspace. I managed to suspend
>     the laptop
>     > >
>     > > once
>     > >
>     > > > more in this state (by closing the lid). Upon opening the
>     lid again,
>     > >
>     > > ubuntu
>     > >
>     > > > threw me in a low resolution mode running their
>     display-config utility.
>     > > > I could still not change VTs to a console. At this point I
>     restarted
>     > > > the laptop.
>     > > >
>     > > > Should I post any log files?
>     > > >
>     > > > By the way, this is a long shot, but I know the uvcvideo
>     module has
>     > >
>     > > caused
>     > >
>     > > > problems in the past, could it do so again? This is a long shot,
>     > > > because the only thing changed when I tried the above with
>     the 2.6.24
>     > > > kernel is updated i915 and drm modules.
>     > >
>     > > Well, if console suspend/resume is working, it's probably not
>     a uvcvideo
>     > > issue, since that would probably prevent the kernel from
>     suspending or
>     > > resuming altogether.
>     >
>     > I'm also 99.9% certain it's not. Just wanted to mention it. And
>     also, it is
>     > possible that the module wasn't loaded when Isuspended in
>     console (I can
>     > double check this later if need be). In any event, the suspend
>     script is
>     > supposed to unload the module before suspend.
>     >
>     > > What X driver are you using?
>     > >
>     > > Everything else is plain ubuntu hardy: intel version:
>     2.2.1-1ubuntu13.
>     > > And
>     >
>     > the xorg.conf is just minimal.
>     > By the way, the logs I caught revealed nothing. I can try to get
>     more
>     > verbose logs later if that's needed.
>
>     What if you suspend w/o using the scripts?  I.e. from X just open
>     an xterm or
>     something as root and do 'echo mem > /sys/power/state'?
>
> I've narrowed down the problem to compiz.
> For what it's worth, suspending directly under X worked fine as far as 
> suspending and resuming is concerned. For some reason I was thrown 
> back at the login screen though, but that's probably not related to 
> this. 
>
> I tried suspending (using gnome-power-manager which uses hal) multiple 
> times while compiz was not running, and that worked perfectly. After a 
> few rounds, I fired up compiz and tried again, only to be greeted with 
> the old cursor above a small rectangle of my desktop. After that, 
> sysrq magic got me out.

I have this problem as well with my 945GM. It related to DRI. If you run 
OpenGL program (such as compiz) after resume, then X will die after you 
run it two times. It works only if you close X and reload drm kernel 
modules after resume. I fire a bug 
(https://bugs.freedesktop.org/show_bug.cgi?id=15728), but no one touch 
it yet.
>
> Khashayar
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> xorg mailing list
> xorg at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/xorg