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Bug#741584: booting T440p with Debian testing - problems



Sorry we didn't respond to this earlier.

On Tue, 2014-04-22 at 06:30 -0500, John M. wrote:
> Hi,
> 
> My workaround was to (boot in recovery mode and) blacklist nouveau, as
> in:
> 
> # echo 'blacklist nouveau' > /etc/modprobe.d/blacklist-nouveau.conf
> 
> After that, reboot in normal mode.
> 
> It seems that the 3.13.x kernel is trying to load drivers for both the
> Intel and NVIDIA cards, and there's a BIOS-related bug that makes the
> NVIDIA card misbehave when on Linux.  Previous versions of the kernel
> didn't do that.
> 
> I hope that helps.

Linux is supposed to be able to switch between the Intel and Nvidia GPUs
at run-time, so loading both drivers is right.

The failure may be related to run-time power management and might be
fixed in a later version.  Have you tested a recent kernel version with
nouveau re-enabled?  There is currently Linux 3.14 in testing/unstable
and 3.16 in experimental.

Ben.

-- 
Ben Hutchings
Any sufficiently advanced bug is indistinguishable from a feature.

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