Bug#598104: does not load i915 driver [Toshiba Satellite C650]
After testing Ubuntu kernel on Debian, I decided to compile my own
kernel from sources. At first I checked Debian patches, where I found
about Debian bug #596709 . Then I learned about kernel bug #14679  and
patch which solves it .
I tried to invoke kernel with acpi=copy_dsdt instead of acpi=off, and it
worked perfectly. There are no more ACPI issues and i915 driver loads
properly also without xorg.conf.
After few days of using Debian kernel with acpi=copy_dsdt I see no
drawbacks. I think that this bug may be marked as solved. I only regret
that I haven't discovered that option earlier (I have read outdated
kernel documentation about possible acpi= arguments).
Thanks for your time and patience.