[Nouveau] gtx 650 ti boost oc random pixels problem

[jurek]

Hello i have nvidia gtx 650 ti boots oc 2gb with 2 monitors and gt 240
for xen emulation .My screen displays random pixels and freeze in random
times . I don't found errors in /var/log/syslog and /var/log/kern.log
its nouveau error on nvidia-driver works fine . Sometimes its freeze.
sometimes there are font errors.
uname -a

Linux debian 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u2 (2017-06-26)
x86_64 GNU/Linux


dpkg -l | grep nouveau

ii libdrm-nouveau2:amd64 2.4.74-1 amd64 Userspace interface to nouvea
-specific kernel DRM services -- runtime

ii libdrm-nouveau2:i386 2.4.74-1 i386 Userspace interface to nouvea
-specific kernel DRM services -- runtime

ii xserver-xorg-video-nouveau 1:1.0.13-3 amd64 X.Org X server -- Nouveau
display driver




http://imgur.com/a/ZHa9h

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