This bug is awaiting verification that the linux-nvidia- tegra/6.8.0-1001.1 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-noble-linux-nvidia-tegra' to 'verification-done-noble-linux-nvidia-tegra'. If the problem still exists, change the tag 'verification-needed-noble-linux-nvidia-tegra' to 'verification-failed-noble-linux-nvidia-tegra'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-noble-linux-nvidia-tegra-v2 verification-needed-noble-linux-nvidia-tegra -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-6.5 in Ubuntu. https://bugs.launchpad.net/bugs/2046315 Title: panel flickering after the i915.psr2 is enabled Status in HWE Next: New Status in linux package in Ubuntu: Triaged Status in linux-oem-6.5 package in Ubuntu: Invalid Status in linux-oem-6.8 package in Ubuntu: Fix Released Status in linux source package in Jammy: Invalid Status in linux-oem-6.5 source package in Jammy: Fix Released Status in linux-oem-6.8 source package in Jammy: Invalid Status in linux source package in Noble: Fix Released Status in linux-oem-6.5 source package in Noble: Invalid Status in linux-oem-6.8 source package in Noble: Fix Released Bug description: SRU verificaton for Noble and oem-6.8-noble: [Impact] In Dell oem project, we found the graphic is flickering on some machines, finally we narrowed down the issue on (some specific panels + i915.psr2 enabled), and the issue was reported to Intel, Intel fixed the issue in the most recent mainline kernel. Here backporting the patches to Noble kernel. It is hard to backport the patches to mantic and oem-6.5, so we wrote a workaround patch to disable the psr2 for those pannels in the oem-6.5. https://gitlab.freedesktop.org/drm/intel/-/issues/9739 [Fix] cherry-pick 8 patches from mainline kernel [Test] I applied the patches to Noble kernel and built a testing kernel, and Dell validated the testing kernel on those machines, the graphic didn't flicker anymore. I installed the testing kernel on some machines with Intel 13th, 12th 11th and 10th gen cpu, the grahic worked well too. [Where problems could occur] This patchset changes the fast wake settings for some gpu, it is possible to make the graphic flicker, but this possibility is very low, since the patchset comes from mainline kernel and we validated the patchset on different gens of Intel cpus. =========================================================================== BugLink: https://bugs.launchpad.net/bugs/2046315 [Impact] On serveral Dell laptops, the screen often displays garbage or the screen is flicking This PR is just a workaround, the upstream bug is here: https://gitlab.freedesktop.org/drm/intel/-/issues/9739#note_2187863 After the upstream fix this bug with a real fix, I will revert the workaround and backport the real fix to Noble and Jammy oem-kernel. [Fix] There is no real fix so far, ODM recommends to use a workaround to disable PSR2, this is a temp solution, after we get the real fix, we could revert the temp workaround. [Test case] booting with the patched kernel, If the pannel's edid is in the qurik list, the PSR2 will be disabled (checking /sys/kernel/debug/dri/0/i915_edp_psr_status; if the pannel's edid is not in the quirk list, the graphic driver will work as before. [Where problems could occur] It is possible that the temp solution couldn't work, then the screen will still show garbage and the screen is flicking, another possible regression is the screen has no problem before, but after running patched kernel, the PSR2 is disabled and the system cost more power, but this possibility is very low, I tested the patched on some dell machines, all worked well. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2046315/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
