[mythtv-users] Nvidia Upgrade Agony

[Larry Kennedy]

On Sun, Dec 28, 2014 at 5:32 PM, Andrew C. (AFPup) Stadt <acstadt at stadt.ca>
wrote:

>
> On 14-12-28 04:08 PM, Larry Kennedy wrote:
>
>> I'm running myth 0.26.1-296 on EL6 (2.6.32-431.el6.i686) with a GT210
>> card and the nvidia 319.32 driver.
>>
>> About a week ago, I accidentally took an update to my Xorg server (now I
>> have xorg-x11-server-Xorg-1.15.0-25.el6.centos.i686), and after that I
>> started getting a driver mismatch error (ABI 15 I seem to recall).  Anyway,
>> I've seen this before, and I believe this means the nvidia 319 driver is at
>> a lower version than is needed, so I figured all I need is an nvidia
>> upgrade. If I remember right, the driver from atrpms was still far enough
>> behind to cause the ABI 15 error, so I tried kmod-nvidia from elrepo.
>> After removing the old nvidia 319 driver, this update pulled in these
>> nvidia libraries:
>>
>> nvidia-x11-drv-340.65-1.el6.elrepo.i686
>> kmod-nvidia-340.65-1.el6.elrepo.i686
>>
>> There is no nvidia kmdl rpm installed now (as was the case before), so I
>> am not sure if this is a problem or not.  When I start the desktop,
>> everything seems fine, and apps like Mozilla work, but none of the myth
>> GUIs will start.  I get a segmentation fault with both the mythfrontend and
>> mythtv-setup. Even with --verbose, mythfrontend gives me nothing to work
>> with.
>>
>> As a test, I also tried doing the nvidia upgrade using scrpms.  With this
>> upgrade, I was forced to move up to kernel-2.6.32-504.3.3.el6.i686, so
>> at least I know this update is pulling in an nvidia-kmdl, unlike kmod. In
>> the end, this upgrade attempt was less successful than the kmod upgrade in
>> that the nvidia driver is never able to load, so the desktop never starts.
>> At the bottom of Xorg.0.log it shows this:
>>
>> [    20.723] (II) LoadModule: "nvidia"
>> [    20.723] (WW) Warning, couldn't open module nvidia
>> [    20.723] (II) UnloadModule: "nvidia"
>> [    20.723] (II) Unloading nvidia
>> [    20.723] (EE) Failed to load module "nvidia" (module does not exist,
>> 0)
>> [    20.723] (EE) No drivers available.
>> [    20.723] (EE) Fatal server error:
>> [    20.723] (EE) no screens found(EE)
>> [    20.723] (EE) Please consult the CentOS support at
>> http://wiki.centos.org/Documentation
>>
>> This seems odd since "modprobe nvidia" succeeds.  I tried nvidia-xconfig
>> to recreate the xorg.conf, but no go. Of course I am rebooting every time
>> to get a clean start.  After many attempts, it looks like kmod-nvidia
>> 340.65 may be my best option.
>>
>> Is anyone aware of an issue with mythtv 0.26 and the nvidia 340.xx
>> driver?  Alternatively, if anyone has ideas on how to get the scrpms nvidia
>> driver to work, I am open to trying that again too.
>>
>> I have options, but nothing looks good.  Downgrading Xorg seems
>> problematic, so I didn't go there. I suppose I could upgrade myth to
>> version 0.27 and see what happens, but that presents some difficulty on EL6
>> (although I know that scrpms has compiled both myth 0.27 and the compatible
>> version of Qt). It also triggers multiple myth upgrades for BE-FE
>> compatibility. Another option is to go to EL7, but that requires a decent
>> effort too since there is no good upgrade-in-place from EL6 32-bit to EL7).
>>
>> I apologize in advance if this post is somewhat schizophrenic.  I can
>> provide more details if anyone can lend a hand.
>>
>> Larry
>>
>>
>>  Just a shot in the dark here, but did you update the necessary gl(x)
> libraries at the same time?  If you could get to a desktop but Myth
> segfaults (and you're using the OpenGL painter, there might be some library
> mismatch or whatnot.
>
> You can always do a "glxinfo | head -4", should show something like:
> name of display: :0.0
> display: :0  screen: 0
> direct rendering: Yes
> server glx vendor string: NVIDIA Corporation
>
> Don't run EL so not sure what the "correct" method of this is.
>

Andrew,  I get the same thing:

name of display: :0.0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: NVIDIA Corporation


> HTH,
>
> Andrew
>
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