[Virtual-pkg-base-maintainers] Bug#800449: base: Text unreadable on login and on first xfce desktop windows on P4 with i915

[dan]

Package: base
Severity: important



-- System Information:
Debian Release: 8.2
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.16.0-4-686-pae (SMP w/1 CPU core)
Locale: LANG=fr_BE.utf8, LC_CTYPE=fr_BE.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

After each reboot, the login screen based on lightdm is mostly unreable.
Some letters are not visble, others are distorted.
But login is working. The 2 panels (top and bottom) of Xfce desktop comes up with some dostorison also. After a while, the screen comes OK and reactivity increases.

A file with lspci shows the displays infos.
An Intel VGA 82845G/GL[Brookdale-G]/GE/PE) is running on Compaq Computer Corporation Evo D510 with P4 1,8GHZ (agpgart-intel and i915 kernel driver).
Another file with dmesg shows infos about GPU HANG related to i915m (ring hung).

A file with GPU HANG dump is also in attach.