Created attachment 916018 [details, diff] for /etc/portage/patches/sys-kernel/gentoo-sources-6.6.67/ HP EliteBook laptop with Radeon Vega; after resume from suspend or hibernate the backlight stays on high intensity. Control files under /sys/class/backlight/amdgpu_bl0/ show only the requested brightness, backlight stays close to 100%. Also reported earlier on a Lenovo Thinkpad e495 and kernel 6.12.5 . https://lore.kernel.org/stable/D6HQK0PSRVBC.XEUGZC9N1O5K@svmhdvn.name/ Reported upstream: https://gitlab.freedesktop.org/drm/amd/-/issues/3879 Turns out, it's a duplicate (but the other description was different). There is a fix, queued for 6.12.9 but I don't see it lined up for 6.6.70 . Maybe 6.12.x will be fixed by the time Gentoo marks it stable, but 6.6.x is broken as of now. Attaching a patch from my portage/patches/ . The diff is against 6.6.69 but the patch works fine on 6.6.67 . Now running 6.6.67, no issue.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=3eb3c626154d2d4bcd12dc7833593f3e47241735 commit 3eb3c626154d2d4bcd12dc7833593f3e47241735 Author: Mike Pagano <mpagano@gentoo.org> AuthorDate: 2025-01-09 15:08:43 +0000 Commit: Mike Pagano <mpagano@gentoo.org> CommitDate: 2025-01-09 15:08:43 +0000 sys-kernel/gentoo-sources: add 6.6.70, HP Elitebook patch drm/amdgpu: fix backport of commit 73dae652dcac Closes: https://bugs.gentoo.org/947639 Signed-off-by: Mike Pagano <mpagano@gentoo.org> sys-kernel/gentoo-sources/Manifest | 3 +++ .../gentoo-sources/gentoo-sources-6.6.70.ebuild | 27 ++++++++++++++++++++++ 2 files changed, 30 insertions(+)
