[Pkg-xen-devel] Bug#804884: xen-hypervisor-4.4-amd64: Starting with hypervisor get nouveau CACHE_ERROR in dmesg without hypervisor -> OK

[ced]

Package: xen-hypervisor-4.4-amd64
Version: 4.4.1-9+deb8u1
Severity: critical
Justification: breaks the whole system

Dear Maintainer,

-- System Information:
Debian Release: 8.2
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

xen-hypervisor-4.4-amd64 depends on no packages.

Versions of packages xen-hypervisor-4.4-amd64 recommends:
ii  xen-utils-4.4  4.4.1-9+deb8u1

xen-hypervisor-4.4-amd64 suggests no packages.

-- no debconf information

Instaled system from scratch everything works OK.
Instaled xen.
Booting with Hypervisor system get to first screen of lightdm.
Sometimes login widget comes up, sometimes doesn't come to that.
dmesg is filled with similar lines
------------------
Nov 12 17:04:35 amd64 kernel: [  377.611518] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 1 [Xorg[1092]] subc 7 mthd 0x1900 data 0x00190190
Nov 12 17:04:35 amd64 kernel: [  377.611536] nouveau E[   PFIFO][0000:01:00.0] CACHE_ERROR - ch 1 [Xorg[1092]] subc 7 mthd 0x1808 data 0x00000000
------------------
Sometimes system freezes switch off only solution