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albright
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PostPosted: Mon Apr 09, 2018 12:40 pm    Post subject: kernel 4.16 questions Reply with quote

running 4.16.1 on thinkpad x1 carbon (4th gen) and I
notice

1. intel microcode does not load - are the fixes in the new kernel ??

2. i915: unknown parameter 'enable_guc_loading' ignored -- why the change?

3. i915: unknown parameter 'enable_guc_submission' ignored -- why the change?

any insight appreciated ...
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Jaglover
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PostPosted: Mon Apr 09, 2018 1:19 pm    Post subject: Reply with quote

I'd say very likely your kernel config is broken in some way.
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albright
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PostPosted: Mon Apr 09, 2018 3:25 pm    Post subject: Reply with quote

Quote:
I'd say very likely your kernel config is broken in some way.


always possible - but everything works fine; just a "make silentoldconfig"
from the 4.15 kernel config. No i915 or firmware changes came up that
I saw...
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Jaglover
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PostPosted: Mon Apr 09, 2018 3:33 pm    Post subject: Reply with quote

See Documentation/admin-guide/README.rst for valid make targets. I would certainly not do silentoldconfig, BTW, this target is done by make automatically.
In your first post you tell firmwares do not load and now you say everything works fine? ;)
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albright
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PostPosted: Sun Apr 15, 2018 12:55 pm    Post subject: Reply with quote

So ... nobody know what's up with the 4.16 kernel
and i915?

I've found out that rc6 has been disappeared (see Torvald's own worlds:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/i915/i915_params.c?h=v4.16&id=fb6db0f5bf1d4d3a4af6242e287fa795221ec5b8

semaphores is gone as well (via modinfo)

but modinfo still shows guc info so I'm still wondering why it is
an "unknown parameter" in dmesg.

perhaps I have to build the guc firmware explicitly into the kernel? (never had to before)
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Gusar
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PostPosted: Sun Apr 15, 2018 2:42 pm    Post subject: Reply with quote

Take a closer look at the modinfo output :). The parameters you're trying to use are not there, but there is an enable_guc parameter:
Code:
parm:           enable_guc:Enable GuC load for GuC submission and/or HuC load. Required functionality can be selected using bitmask values. (-1=auto, 0=disable [default], 1=GuC submission, 2=HuC load) (int)

I went looking through the git log, the change happened in December 2017: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/i915?id=121981fafe699d9f398a3c717912ef4eae6719b1
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albright
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PostPosted: Sun Apr 15, 2018 8:48 pm    Post subject: Reply with quote

Quote:
Take a closer look at the modinfo output


thanks Gusar - I didn't notice they changed the *name* :?
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bunder
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PostPosted: Mon Apr 16, 2018 7:28 am    Post subject: Reply with quote

albright wrote:
I've found out that rc6 has been disappeared (see Torvald's own worlds:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/i915/i915_params.c?h=v4.16&id=fb6db0f5bf1d4d3a4af6242e287fa795221ec5b8


FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF. :x

I still need that. 4.14 totally trashed my new laptop. Turning off rc6 was the only way I could keep xorg from flickering like mad.
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albright
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PostPosted: Mon Apr 16, 2018 12:07 pm    Post subject: Reply with quote

Quote:
Turning off rc6 was the only way I could keep xorg from flickering like mad


perhaps gentoo should issue a patchset to turn RC6 control back on in the gentoo kernel?
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Maitreya
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PostPosted: Mon Apr 16, 2018 9:53 pm    Post subject: Reply with quote

Just for that one user?

You can try, but don't blame them for not wanting.

You could easily roll your own patches, as that link has it.
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