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Re: [Libreboot] X60 freezes with kernel > 4.0.7

From: Robert Alessi
Subject: Re: [Libreboot] X60 freezes with kernel > 4.0.7
Date: Thu, 16 Jul 2015 12:08:10 +0200

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.

Attachment: snapshot1.png
Description: PNG image

Attachment: snapshot2.png
Description: PNG image

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