It seems only 5.15 was the problem. I can confirm it to work on most of the next major versions: I tried the latest of each series, 5.17.x, 5.18.x, 5.19.x and finally 6.0.0 and 6.0.1 and it works on all of them.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1973676 Title: flickering and black screen after grub after 22.04 upgrade Status in linux package in Ubuntu: Incomplete Bug description: On an HP x360 Spectre (i7-8565U WhiskeyLake-U GT2 [UHD Graphics 620]), after upgrading from 21.10 to 22.04, at boot time just after grub, the kernel displays some errors messages then goes to black. I configure my machine with an encrypted filesystem and before it was going to the splash screen and asking for the partition password. If I type in the password, it seems to boot but the screen stays black forever. It seems the bug started with the 5.15.x series. I have been able, using "mainline" to update up to 5.14.21. After this version the problem appears. Before it's fine. I found the following errors in the logs: * i915 0000:00:02.0: [drm] *ERROR* Atomic update failure on pipe A (start=43426 end=43427) time 300 us, min 2146, max 2159, scanline start 2131, end 2171 * i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4) * i915 0000:00:02.0: [drm] [ENCODER:102:DDI B/PHY B] is disabled/in DSI mode with an ungated DDI clock, gate it * i915 0000:00:02.0: [drm] [ENCODER:113:DDI C/PHY C] is disabled/in DSI mode with an ungated DDI clock, gate it * i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun So the problem is > 5.13.x series It might be related to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958191 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1973676/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
