Hi, I've been working with various reporters to try and get the sometimes severe gfx glitches which people are seeing with kernel >= 5.10.9 resolved, see the following bugs: 1843274 - i915 GPU Hang with kernel 5.7 on Haswell (Acer C720P Chromebook) 1925346 - Screen glitches after updating to Kernel 5.10.10 1925903 - Flickering UI elements, screen instability (Wayland) 1931065 - Frequent i915 hangs I've written 2 patches 2 address this and asked users to test Fedora-kernel scratch-builds with those patches added. The first patch is i915-revert.patch, this reverts 3 troublesome commits which were first added in 5.10.9 these commit change the i915 mitigations for a year old i915 CVE which IIRC was mostly about data leaking from a previous GPU context to the next. These patches enable these mitigations on more GPU models, where they were previously disabled because they were causing issues... Reporters have reported a 100% success-rate in getting rid of the gfx issues with these 3 reverts. The second patch is i915-fixes.patch, this cherry-picks 3 patches from -next instead (these were suggested by i915 upstream) and this also helps for most users, but some users still report some rendering artifacts (but overall things are much better). Upstream has gone silent on the issue of there still being rendering artifacts with the 3 cherry-picked fixes unfortunately. Given that we are getting more and more bug-reports about this I think that we should be do something about this downstream. Upstream seams to be aiming for fixing things, rather then reverting, so going with i915-fixes.patch will stay the closest to what I expect to land in 5.10.y and 5.11.y at some point. Regards, Hans _______________________________________________ kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/kernel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
