[CentOS] Centos 7 Nvidia openGL breaks vncserver

[Ned Slider]

On 18/11/14 18:32, Stan Cruise wrote:
> Bare metal Centos 6.5, vncserver running, client able to connect with
> perfect resolution. Nvidia GT240, driver 331.49.
> 
> Upgrade to Centos 7 with nouveau basic driver, all still works fine.
> Resolution poor on wire connected monitor, but perfect on vnc client
> session (1920x1080).
> 
> Upgrade Nvidia driver via elrepo. 340.58; removed nouveau via 'Software'
> manager. Excellent wired monitor resolution.
> 
> But >> Client vnc connect receives the dreaded 'oh no, something has .....'
> 
> Backed out Nvidia  340.58, back to nouveau, client vnc works again. Also
> tried 304 driver (only other one in elrepo for el7) - same problem.
> 

If it's of any help to you I have just restored the last 331.xx series
driver (331.89) to the elrepo repository. It's currently syncing and
should show up on the mirrors shortly. At least now you should be able
to make a like for like driver comparison with your el6 install.

http://elrepo.org/linux/elrepo/el7/x86_64/RPMS/

kmod-nvidia-331.89-1.el7.elrepo.x86_64.rpm
nvidia-x11-drv-32bit-331.89-1.el7.elrepo.x86_64.rpm
nvidia-x11-drv-331.89-1.el7.elrepo.x86_64.rpm


> Research seems to indicate that openGL does not play well with vnc. I
> cannot see any solutions posted as yet.
> 
> So, what are my options?
> 
> Maybe change out the video card for AMD? I cannot know if the Catalyst
> driver will work, but there is a much more active and extensive open
> driver community, which could work better than nouveau?
> 
> And I noted the Linus 'salute' to Nvidia....... Good timing.
> 
> 
> Stan
>