[Bug 80629] i915 w/ 845GL: black screen with moveable mouse when X/kdm starts

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80629

--- Comment #15 from pdi at otenet.gr ---
Created attachment 102267
  --> https://bugs.freedesktop.org/attachment.cgi?id=102267&action=edit
runlevel 4 dmesg with drm.debug=6

Still with kernel 3.16.0-rc3, and applied patch from comment 9.

A few notes that might help.

[   11.014827] [Firmware Bug]: Duplicate ACPI video bus devices for the same
VGA controller, please try module parameter "video.allow_d
uplicates=1"if the current driver doesn't work.
-- For this I have tried both 'video=SVIDEO-1:d' and 'video.allow_d
uplicates='0|1 with no result.

[  107.248698] i915: render error detected, EIR: 0x00000010
-- This is the first login screen. It is about where the black screen appeared
with kernel 3.14.5. With 3.16.0-rc3, there is usually no black screen, but the
remainder of the initial description still happens, ie login screen doesn't
change to desktop and you have to logout and login again before you can work
normally. I have to point out that to diminish the chance of a black screen
during logout, I have in kdmrc 'TerminateServer=true', so at each logout the X
server restarts.

[  336.708729] [drm:drm_mode_getconnector] [CONNECTOR:7:?]
-- This must be the beginning of the first login.

[  428.826241] [drm:drm_mode_getconnector] [CONNECTOR:7:?]
-- This must be the beginning of the second login. It may be irrelevant, but it
is noticeably shorter. It feels like that too, the second login.

Thanks for keeping at it.

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