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#1 2020-03-24 18:45:34

IceWeasel
Member
Registered: 2020-03-24
Posts: 2

[Solved]Kably Lake Processor panic when entering low power state!

One of many error outputs:
https://pastebin.com/4hLJGKgP

the fix :
replace
/usr/lib/firmware/i915/kbl_dmc_ver1_04.bin

with
https://github.com/wkennington/linux-fi … er1_04.bin

I don't know if anyone else needs this. I've searched for the solution and couldn't find it until now
Driver was enabling dc_state even while plugged in, unplugging laptop fixed issues, any attempt to go
into lower power state while on ac caused kernel panic.

Last edited by IceWeasel (2020-03-24 23:14:27)

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#2 2020-03-24 18:56:01

loqs
Member
Registered: 2014-03-06
Posts: 10,093

Re: [Solved]Kably Lake Processor panic when entering low power state!

Have you reported the issue upstream?  https://gitlab.freedesktop.org/drm/inte … -i915-bugs
How did you arrive at your solution?  What is the difference in the firmware?
Edit:
The kbl_dmc_ver1_04.bin you linked to and the firmware arch supplies are the same:

sha256sum /tmp/kbl_dmc_ver1_04.bin 
2cde41c3e5ad181423bcc3e98ff9c49f743c88f18646af4d0b3c3a9664b831a1  /tmp/kbl_dmc_ver1_04.bin
sha256sum /usr/lib/firmware/i915/kbl_dmc_ver1_04.bin 
2cde41c3e5ad181423bcc3e98ff9c49f743c88f18646af4d0b3c3a9664b831a1  /usr/lib/firmware/i915/kbl_dmc_ver1_04.bin

Last edited by loqs (2020-03-24 19:06:25)

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#3 2020-03-24 22:49:40

IceWeasel
Member
Registered: 2020-03-24
Posts: 2

Re: [Solved]Kably Lake Processor panic when entering low power state!

You are correct sir, i moved it the wrong place, however getting rid of it, fixes the problem

[    3.844731] i915 0000:00:02.0: Direct firmware load for i915/kbl_dmc_ver1_04.bin failed with error -2
[    3.844734] i915 0000:00:02.0: Failed to load DMC firmware i915/kbl_dmc_ver1_04.bin. Disabling runtime power management.

Problem Solved .....

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#4 2020-03-24 23:04:57

loqs
Member
Registered: 2014-03-06
Posts: 10,093

Re: [Solved]Kably Lake Processor panic when entering low power state!

IceWeasel wrote:

Problem Solved .....

If you do not want to report the issue upstream please mark your thread as solved.

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