Bug 20036 - [KMS] Loading 2.6.29-rc4 i915 locks up the machine
Summary: [KMS] Loading 2.6.29-rc4 i915 locks up the machine
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: Jesse Barnes
QA Contact:
Keywords: NEEDINFO
Depends on:
Reported: 2009-02-10 05:32 UTC by Bernhard Rosenkraenzer
Modified: 2017-07-24 23:10 UTC (History)
0 users

See Also:
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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