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Re: [Libreboot] X60 freezes with kernel > 4.0.7

From: Francis Rowe
Subject: Re: [Libreboot] X60 freezes with kernel > 4.0.7
Date: Thu, 16 Jul 2015 12:35:29 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.7.0

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On 16/07/15 11:08, Robert Alessi wrote:
> On Wed, Jul 15, 2015 at 04:20:56PM -0500, Will Hill wrote:
>> Is your fan in good condition and your heat exchanger dust free?
>> The slim series, denoted by the s, is known for overheating.
> Thank you very much for the hint.  You are perfectlty right.  So I 
> carefully cleaned the fan and the heat exchanger this morning.
> Then I booted 4.1.2, and worked on it for about an hour.  The X60s
> did not freeze, and to my knowledge xsensors gave me acceptable
> values, such as 47.0°C coretemp and 2769 RPM for fan1.
> However --and this is the important point-- I tried to reboot
> twice: - on the first attempt, I got snapshot1.png (attached); - on
> the second attempt, I got snapshot2.png (also attached), namely a 
> kernel panic.  This is much worse, as it makes kernels starting
> from 4.1.1 unusable at least for libreboot laptops such as mine.
> Then I reverted to linux-libre 4.0.7, and everything works fine
> again.
> Provisional conclusion: I strongly suspect that something is wrong
> in kernels above 4.0.7.  Is it related to the bluetooth subsystem?
> I can't say.  But I am convinced there is something.

Looks like it's related to the graphics (i915 driver). Can you compile
a full bug report? Also, boot with drm.debug=0x06 enabled on the
"linux" line in GRUB. Then try to reproduce the error, and post the
logs. (especially kernel logs at boot, and the crash logs) is where you can submit bug reports for
the linux kernel.

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