linux-kernel - More details - Re: i915 module with modeset=1 freezes machine (kernels 2.6.33 and 2.6.36)

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Message-ID: <4CC7DDCC.7040605@elka.pw.edu.pl>
Date:	Wed, 27 Oct 2010 10:07:40 +0200
From:	Wojtek Zabolotny <W.Zabolotny@...a.pw.edu.pl>
To:	linux-kernel@...r.kernel.org
Subject: More details - Re: i915 module with modeset=1 freezes machine (kernels
 2.6.33 and 2.6.36)

I have tried to boot my desktop machine (chipset 82865G with agpgart and 
i915 compiled into kernel) with i915.modeset=0
In this case machine works, but X work only with vesa driver.

Browsing reports about similar problems I have found suggestion to use 
i915.modeset=1 i915.powersave=0
unfortunately this also leads to black screen and freeze of machine.

In my laptop machine (chipset 945GM with agpgart and intel_agp and i915 
compiled as modules), when I reload i915 with modeset=1 it causes 
immediate black screen and freeze (the value of powersave parameter does 
not change the behaviour of my system).

I have also found some info that the problem may be related to detection 
of lid switch (in laptop) - I tried to press and release the lid switch 
in my laptop machine - this switched the backlight on, but system was 
still frozen and unaccessible.

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