Issue or bug concerning DRRS on old i7-4980HQ
René Herman
rene.herman at gmail.com
Sat Aug 2 10:36:02 UTC 2025
On 01-08-2025 11:19, Jani Nikula wrote:
> On Thu, 31 Jul 2025, René Herman <rene.herman at gmail.com> wrote:
>> Here's that Ubuntu launchpad bug on freedesktop.org, but including a
>> possibly interesting fix from 5 months ago in the currently last comment:
>>
>> https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/3441
>
> Might be useful to attach dmesg and VBT to the bug as described at [1].
Just in case: please note the freedesktop.org bug is not our bug but
just a 4 year old same one. I also unfortunately don't have the hardware
on hand, and it seems the person I am assisting with this can't due to
vacation get to it right now.
Although I'm not a graphics/display person, seems to me it's more or
less fixed by Arun Murthy (added to the To: list) in the last, still
recent-ish comment on that bug?
https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/3441#note_2803858
I.e., could while working with the person with the hardware not figure
out what the point of that i915_drrs_ctl would be if the system
immediately enabled it again anyway, so Arun's approach seems to make
sense to me.
This is probably going to be a more common issue soon when these older
no-TPM Haswell systems get installed with Linux at the end of Windows 10
support.
Regards,
Rene
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