Comment 281 for bug 993187

@Danny Goodall (#279): Indeed, my freeze experiences have been only with the laptop that I regularly dock, my ThinkPad T520. Connected to that are an external monitor, mouse, and keyboard. I'd have to say I wouldn't have thought to consider this arrangement to be a contributor to the problem, but that other bug report has got me wondering. My other laptop is a ThinkPad X1, which is sort of my "lab" laptop; I put it through a much more rigorous workout with experimental builds of a variety of packages and it's never frozen once.

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@Timo Aaltonen (#280): That's curious. I wasn't aware that the FBC parameter was causing problems; I've read only of issues related to RC6. I'm currently booted into the 3.4.1 kernel, I'm using no i915 kernel boot parameters, and here's the current state of my i915 driver:

steve@t520:~$ sudo grep . /sys/module/i915/parameters/*
/sys/module/i915/parameters/enable_hangcheck:Y
/sys/module/i915/parameters/fbpercrtc:0
/sys/module/i915/parameters/i915_enable_fbc:-1
/sys/module/i915/parameters/i915_enable_ppgtt:-1
/sys/module/i915/parameters/i915_enable_rc6:-1
/sys/module/i915/parameters/lvds_downclock:0
/sys/module/i915/parameters/lvds_use_ssc:-1
/sys/module/i915/parameters/modeset:-1
/sys/module/i915/parameters/panel_ignore_lid:0
/sys/module/i915/parameters/powersave:1
/sys/module/i915/parameters/reset:Y
/sys/module/i915/parameters/semaphores:-1
/sys/module/i915/parameters/vbt_sdvo_panel_type:-1

FBC is set to "-1", which means to use the chip's default setting. This would imply that the kernel isn't built to configure a particular setting. Can you provide more information on the specific change made in 3.3 and that's planned for 3.2?