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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - 845G: crtc active state doesn't match with hw state"
href="https://bugs.freedesktop.org/show_bug.cgi?id=64764#c14">Comment # 14</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - 845G: crtc active state doesn't match with hw state"
href="https://bugs.freedesktop.org/show_bug.cgi?id=64764">bug 64764</a>
from <span class="vcard"><a class="email" href="mailto:mlsemon35@gmail.com" title="mlsemon35@gmail.com">mlsemon35@gmail.com</a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=64764#c13">comment #13</a>)
<span class="quote">> Can you please grab the latest intel-gpu-tools git from
> <a href="http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/">http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/</a> and then grab the
> output of intel_reg_dumper both while the screen is on and once it's off
> (i.e. after the WARN hit dmesg)?
>
> If you don't have ssh to do grab the 2nd dump you can do
>
> xset dpms force off ; sleep 2; intel_reg_dumper > reg_dump.off</span >
It looks like I did not mention that the monitor comes back up, as if `xset
dpms force off` does only a temporary blanking of the screen, barely 2 seconds.
intel-gpu-tools-1.3 is part of slackware-current, so I used it, and it gave me
this (as root)...
root:~$ xset dpms force off; sleep 2; intel_reg_dumper > dumper.out
Gen2/3 Ranges are not supported. Please use unsafe access.Aborted
...which I saw last year when I compiled intel-gpu-tools from source and tried
to use it.
As for tools that might work here, there's a /sys/kernel/debug/dri directory
available, and the i915 tracers are available. After I go back home tomorrow,
serial console/capture will be available as well.
This DRM debug and DPMS debugging is causing X11 to become unstartable
sometimes. It acts like it's going to start Xfce but stops at a blank screen.
When I switch back to the console from which I typed `startx`, this shows up
over and over:
__kgem_bo_map__gtt: failed to retrieve GTT offset for handle=26: 5
Is this a message from the Intel X11 driver? Ctrl-c stops X11 and the printing
of these messages, but it takes a reboot in order to use X11 again.
Thanks for bearing with me! [Reminder to self: More coffee is needed in the
morning.]
Michael</pre>
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