[mythtv-users] Video quality on 0.28 worse than it was on 0.21

Fri Aug 24 14:20:58 UTC 2018

Clearly the drivers were not installed correctly as shown
*configuration: driver=nouveau latency=0*

And
*more: stat of /etc/modprobe.d/nvidia-graphics-drivers.conf failed: No such
file or directory*

I installed using the GUI that was something like Other Drivers, an option
that somehow disappeared from the menu but shows up under the software
update tab now.

Initially I autoinstalled the 340 driver, which was a disaster for the 8600
card. I then purged the system and installed the 304 driver manually, still
had issues and went back to the 6200 card, which worked better but clearly
the nvidia drivers are not there.

I saw instructions to use the Administrator tab to finish the install but I
don't have that tab so I went to the tab that lists the driver options and
saw that 304 was listed and checked as installed and the the nouveau was
there as an option.  I then selected the nouveau and installed that
followed by selecting the 304 and reinstalling it.  I thought that would
allow the system to do a proper install but obviously I was wrong.

The only thing I can think of at this point is to purge the system of
nevidia drivers and then do the autoselect again with the 6200 card so that
the 304 driver will be selected.

Allen

On Fri, Aug 24, 2018 at 2:35 AM, Stephen Worthington <
stephen_agent at jsw.gen.nz> wrote:

> On Fri, 24 Aug 2018 15:37:30 +1000, you wrote:
>
> >On 24 August 2018 at 15:31, Mike Holden <mikeholden99+mythtv at gmail.com>
> >wrote:
> >
> >> Yes, you need to disable nouveau so that the nvidia driver can load at
> >> boot time.
> >>
> >>
> >> On 24 August 2018 at 15:17, glen <glenb at glenb.us> wrote:
> >>
> >>> On Thu, 2018-08-23 at 21:54 -0700, Allen Edwards wrote:
> >>>
> >>> I don't think the nvidia drivers are getting loaded and I can't figure
> >>> out how to get them used.  I uninstalled them and installed them using
> the
> >>> Other Drivers section and still I get this:
> >>>
> >>> *allen at MythNew:~$ lsmod | grep video*
> >>> *video                  40960  1 nouveau*
> >>> *allen at MythNew:~$ lsmod | grep nvidia*
> >>> *allen at MythNew:~$*
> >>> allen at MythNew:~$ lsmod | grep NVIDIA
> >>> allen at MythNew:~$
> >>>
> >>> maybe disable nouveau in /etc/modprobe.d . i think if your nvidia was
> installed correctly you would have a
> >>>
> >>> conf in that directory that blacklists the nouveau driver. i would
> also check /lib/modules/ to see if there is even an
> >>>
> >>> nvidia.ko module there. my guess is that your nvidia package is not
> installing. try a sudo modprobe nvidia and see what the
> >>>
> >>> result is.
> >>>
> >>>
> >Oops, that posted before I intended :-(
> >
> >Apologies for the top-post as well, I hadn't finished writing my reply.
> >
> >Check out the MythTV Wiki page for Nvidia, which has specific instructions
> >for Ubuntu. No idea how accurate they are, as Ubuntu isn't something I do.
> >
> >From going through this on Fedora, you need to blacklist the nouveau
> >module, add a kernel parameter in your boot config (grub/grub2) to
> >blacklist the driver, and then load the nvidia driver after boot
> completes.
> >I assume Ubuntu is ultimately the same, but possibly achieved via slightly
> >different mechanisms.
> >
> >https://www.mythtv.org/wiki/NVidiaProprietaryDriver
>
> In Ubuntu, all the blacklisting should be done automatically by the
> Other Drivers GUI installer (or "ubuntu-drivers autoinstall", which
> does the same thing).  However, it depends on the version of the
> Nvidia drivers that you need - autoinstall can select a later version
> that does not work (eg 340 for an 8600GT card, which needs 304).  So
> it is best to use the GUI and select the version you need.  The
> correct version can be found in the documentation of installed Nvidia
> drivers, or on the Nvidia site.
>
> If the Nvidia drivers install properly, then a file like this will be
> installed:
>
> /etc/modprobe.d/nvidia-graphics-drivers.conf
>
> With my 340 drivers, it contains this:
>
> # This file was installed by nvidia-340
> # Do not edit this file manually
>
> blacklist nouveau
> blacklist lbm-nouveau
> blacklist nvidia-current
> blacklist nvidia-173
> blacklist nvidia-96
> blacklist nvidia-current-updates
> blacklist nvidia-173-updates
> blacklist nvidia-96-updates
> blacklist nvidia-340-updates
> alias nvidia nvidia_340
> alias nvidia-uvm nvidia_340-uvm
> alias nouveau off
> alias lbm-nouveau off
>
> To find out what drivers are active, do this command:
>
> lshw -C video
>
> which gives this for me:
>
>   *-display
>        description: VGA compatible controller
>        product: GT216 [GeForce GT 220]
>        vendor: NVIDIA Corporation
>        physical id: 0
>        bus info: pci at 0000:01:00.0
>        version: a2
>        width: 64 bits
>        clock: 33MHz
>        capabilities: pm msi pciexpress vga_controller bus_master
> cap_list rom
>        configuration: driver=nvidia latency=0
>        resources: irq:55 memory:fd000000-fdffffff
> memory:c0000000-cfffffff memory:d0000000-d1ffffff
> ioport:e000(size=128) memory:fe000000-fe07ffff
>
> You can see on the "configuration:" line that it says "driver=nvidia".
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