On Sat, 02 Aug 2025, René Herman <rene.her...@gmail.com> wrote: > On 01-08-2025 11:19, Jani Nikula wrote: > >> On Thu, 31 Jul 2025, René Herman <rene.her...@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.
Hacking debugfs is not a fix, it's a hack. > 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. On the upside, we'll get more people with the hardware to test. BR, Jani. -- Jani Nikula, Intel
