Re: [REGRESSION] drm/xe/guc: Lenovo Thinkpad X1 Carbon Gen 12 can't boot with 6.16.9 and Xe driver

["Iyán Méndez Veiga" <me@iyanmv.com>]

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Hello,

On 27/09/2025 14:52, Thorsten Leemhuis wrote:
> Does 6.17-rc7 work for you? We need to know if this needs to be fixed in
> just the stable tree or if it is something that needs to be addressed in
> mainline as well.

6.17-rc7 boots fine, so the issue is just in the stable tree.
> Just wondering: why are those parameters needed? Is the hardware not
> fully supported be the xe driver yet?

i915 is still the default driver for Meteor Lake integrated GPUs, so 
that's why I need to pass those parameters. Lunar Lake already uses Xe 
by default, though. In my experience, for at least the last two kernel 
release cycles, I've observed better battery life and performance using 
the Xe driver.

I do not have concrete numbers about power usage and battery life, just 
my (subjective) feeling after using the laptop for a week with i915 and 
another week with Xe. About performance, Michael from Phoronix recently 
shared some benchmarks with a Core Ultra 7 155H (same CPU as the 
Thinkpad X1 Carbon Gen 12):

https://www.phoronix.com/review/intel-mtl-i915-xe-linux
> Ciao, Thorsten

Best,
Iyán

-- 
Iyán Méndez Veiga
GPG Key: 204C 461F BA8C 81D1 0327  E647 422E 3694 311E 5AC1


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