Bug 20036

Summary:	[KMS] Loading 2.6.29-rc4 i915 locks up the machine
Product:	DRI	Reporter:	Bernhard Rosenkraenzer <bero>
Component:	DRM/Intel	Assignee:	Jesse Barnes <jbarnes>
Status:	CLOSED FIXED	QA Contact:
Severity:	normal
Priority:	medium	Keywords:	NEEDINFO
Version:	unspecified
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Bernhard Rosenkraenzer 2009-02-10 05:32:36 UTC

When doing "modprobe i915" on a Compaq Presario CQ70 (Graphics chip 8086:2a42 subsystem 103c:360b) running 2.6.29-rc4 with KMS enabled in 32 bit mode, the display turns black and the machine locks up.

It works fine without KMS; so does (with the exception of a few other, less critical bugs) 2.6.29-rc2 with KMS.

2.6.29-rc3 behaves like 2.6.29-rc4.

Comment 1 Jesse Barnes 2009-03-12 16:40:27 UTC

How about -rc7?  If you see the lockup again, you might be able to login remotely and capture a sysrq-t to see where things are hanging (or just "echo t > /proc/sysrq-trigger" then capture the dmesg somewhere).  We had a deadlock in the LVDS probing around -rc4, so maybe you were hitting that.

Comment 2 Jesse Barnes 2009-03-19 13:32:51 UTC

Pretty sure this one is fixed.

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