Hard freezes of ThinkPad T41p (ATI Mobility FireGL T2)

[Alex Deucher]

On Jan 30, 2008 10:59 AM, Valentin Schwamberger <v.schwamberger at gmx.de> wrote:
> Alex Deucher wrote on 30.01.2008 15:39:
>
> > On Jan 30, 2008 6:22 AM, Valentin Schwamberger <v.schwamberger at gmx.de> wrote:
> >> Alex Deucher wrote on 28.01.2008 00:34:
> >>
> >>> On Jan 26, 2008 8:48 PM, Valentin Schwamberger <v.schwamberger at gmx.de> wrote:
> >>>> Hi,
> >>>>
> >>>> whatever we have already tried yet, my T41p keeps to hard freeze (no
> >>>> sysrqs, network, serial connection). So far we have tried an endless
> >>>> number of xorg.conf options, several linux kernel versions, kernel
> >>>> options, etc.
> >>>>
> >>>> As you can see from the subject it's an T41p with an ATI Mobility FireGL
> >>>> T2 video card. The special setup, however, is the usage of a port
> >>>> replicator (IBM portreplicator II) and its DVI output. As far as I can
> >>>> tell, the system seems to run stable when I only use the local flat
> >>>> panel (not absolutely sure, though). I also don't use it much, but it
> >>>> also seems to be stable in windows.
> >>>> Now the funny part is it sometime works stable for hours (once the
> >>>> desktop was properly started it runs forever). But very often after
> >>>> system start up, either the display doesn't come up and stays black (I
> >>>> then have to switch to console and back to X and then it suddenly
> >>>> works). This problem does more often happen, when the LID is closed.
> >>>> The worst problems are the hard freezes, X is already started, login to
> >>>> gdm was successful and the desktop is started, mostly at the end of
> >>>> gnome initialization the hard freeze occurs.
> >>>> The hardfreezes also happen on switching outputs with xrandr between
> >>>> LVDS and DVI or after suspend to ram or on switching to the console
> >>>> (required due to the other problem above).
> >>> Remove all of the options you've tried in your current config.  Do any
> >>> of these options help?
> >>>
> >>> 1. Turn off dynamicclocks.  just remove the option.  It's off by
> >>> default.  you'll have to reboot after changing this.
> >>>
> >>> 2. Option "BusType" "PCI"
> >>>
> >>> 3. Option "AGPMode" "4"
> >>>
> >>> 4. Option "DRI" "False"
> >>>
> >>>
> >>> Alex
> >> Thanks a lot for your answer! I have tested all the options (and
> >> different combinations too), but none of them seem to solve the problem.
> >> The freezes still persist, especially when changing from console to X
> >> and vice versa, but also when Gnome's desktop comes up. I tested with
> >> git version from late December and with current git. This happens on
> >> ubuntu 7.10.
> >>
> >> Any more suggestions? How can we debug this further?
> >
> > Can you get a log from one of the locked up sessions?
>
> Yes. It is on
> http://www.pci.uni-heidelberg.de/tc/usr/bernd/downloads/xorg_t41p/Xorg_crash.0.log
>
> I created it by (cold) starting the ThinkPad. In BIOS, the primary
> display was set to DVI (LVDS stays black, ttys are shown on the DVI).
> Then the Xserver/gdm came up. It switched on LVDS and DVI. When I
> changed to the console, back to X, back to the console, back to X, I got
> a hard freeze. This was the easiest way to reproduce it.
>
> The freezes seem to happen more often with DVI set as primary display
> (as stated in the reply to Jerome).
>
> Thanks for all your help!

This might be related to the bios vs. the driver and keeping each
other up to date.  I' working on some patches not to hopefully fix
that which may help in your case.  Is it just VT switches that cause
the lock?  if you use xrandr to adjust turn off LVDS before the VT
switch does that help?

Alex