[mythtv-users] NVRM: GPU has fallen off the bus

[Greg Oliver]

On Thu, May 11, 2017 at 3:30 AM, Peter Carlsson <maillist.peter at home.se>
wrote:

> Hello!
>
> My system has recently frozen about 15 minutes after boot and I see the
> messages below in syslog at that time. I need to do a full power reboot,
> and then it usually works without problem. The temperatures reported by
> sensors at that time seems reasonable to me (< 40 degree C).
>
> Google results suggest different solutions, but nothing unambiguous that
> seems to work for everyone. It could be a hardware or a software issue.
>
> The system is a combined 0.28 BE/FE with Debian Jessie with a first (?)
> generation Intel Core i5-661 CPU with integrated Intel HD Graphics (not
> used) and a PCIe NVIDIA GT215 GeForce GT 240 GPU. I have not done changes
> or upgrades recently except security upgrades.
>
> Since my system horsepower-wise is more than enough I hope I could keep
> all hardware and just replace the GPU if that is the problem. I could
> either buy a new PCIe GPU or use the integrated GPU if the is enough for
> good quality HDTV recordings.
>
> I would appreciate any help to either identify/solve the problem or to
> recommend a good replacement GPU. Back when I bought the PCIe GPU it was
> quite new with VDPAU support in MythTV and it was important to choose the
> correct GPU. Today, maybe it has become easier?
>

I have had this happen to me twice - once with a fanless GT220 that ran for
years and once with a fan'ed GT240 that was just plagued with issues.

The GT220 was actually overheating.  I had used nvidia-settings commands to
run it full throttle with no power management (for some reason???), and it
finally just puked on me after years of service.  The 240 I replaced it
with was apparently some special model I did not investigate properly and
it had 1/2 the RAM installed that nVidia had suggested to OEMs, so it was
falling off the bus when there were not enough internal resources for it to
to VDPAU C media properly.  I returned it and replaced ith with a GT 640 (I
know - overkill, but it had the newer VDPAU D capabilities, and I am not
budget constrained).

Back to the fanless card - it actually ran for another 6 months without
issue once I let it have power management back and it could throttle the
GPU speed down.  Then it just died all-together one day.  I do not disable
throttling any longer and really cannot remember why I ever did - it
probably had something carried over from an ION-1 config or something...?
That was over 6 years ago though.

Point being, it could be motherboard, GPU, RAM on the GPU.....  Hard to
isolate intermittent hardware failures unfortunately.

-Greg
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