Bug#692814: gdm3 is not staring normally

[Praveen A]

package: gdm3
severity: critical
version: 3.6.1-1

In /var/log/gdm3/:0.log I can see this error message (complete log
attached :0.log.error)

DRM_IOCTL_I915_GEM_APERTURE failed: Bad file descriptor
Assuming 131072kB available aperture size.
May lead to reduced performance or incorrect rendering.
get chip id failed: -1 [9]
param: 4, val: 32653
Xorg: ../../intel/intel_bufmgr_gem.c:2783: drm_intel_bufmgr_gem_init:
Assertion `0' failed.

But when I go to single user mode (using grub "recovery mode" menu)
and start manually /etc/init.d/gdm3 it start successfully. Once I exit
from single user mode, I can get the gdm3 screen and login. Attaching
the log of gdm3 after it started successfully (:0.log).

Every time I boot, I have to use the same work around and it is not
intuitive either.

Let me know if you need any other log files.

Thanks
Praveen
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