On Fri, 20 Jun 2014, Adam Williamson wrote:
On Fri, 2014-06-20 at 14:32 -0400, Robert P. J. Day wrote:
> if, however, i simply unplug the external monitor from HDMI, no
> problem, and i can plug in the monitor after booting. oh, and as
> before, once i'm running under this new (but clearly broken) kernel,
> when i go to shut down, massive kernel panic and stack trace.
>
> i can do more testing tomorrow, but this has now been an issue for
> the last three rawhide kernel releases. is no one else seeing
> something like this? more later ...
Issues like this are very hardware specific; it'd be very unusual
for there to be a bug which affected *any* system with an HDMI
display, because the code for dealing with HDMI displays attached to
NVIDIA adapters is entirely different from the code for dealing with
HDMI displays attached to Intel adapters or AMD adapters.
... snip ...
i'll see what kind of debugging i can do this weekend based on the
rest of your note, but here's one more brief data point related to my
current 3.16.0-0.rc1.git3.1.fc21.x86_64 kernel.
if i boot without HDMI connected to external monitor, it works. i
can then plug in external monitor but when i reboot, the shutdown
dumps a kernel stack trace.
*however*, if i boot successfully without an external monitor, and
subsequently never plug one in, then i can reboot just fine. so the
problem rears its ugly head either:
1) booting with HDMI-connected monitor, or
2) shutting down after having, at some point, connected a monitor via
HDMI to the running system.
in short, there's something about HDMI that's screwed, apparently
related to this nouveau driver. more later as i debug further.
rday
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Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
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