Public bug reported: On an HP x360 Spectre (i7-8565U WhiskeyLake-U GT2 [UHD Graphics 620]), after upgrading to 22.04 from 21.10, the display goes to some flickering lines in black and grey or colors (remember the artifacts on Amstrad CPC or C64 when loading from a tape? Same here...).
After the initial grub menu, the kernel loads and boots. There are a few lines of log when the screen is in text mode. As soon as the plymouth screen comes in, the screen starts flickering massively. Nothing appeared on the screen except horizontal lines. I have an encrypted partition, so I type in the password and then the screen goes to flickering lines in color when Wayland starts. I tried different kernels: - 5.17.8: failed - 5.15.x: all failed (from Ubuntu 22.04) - 5.13.19: works and back to normal 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 I temporarily solved it by downgrading to 5.13.19 from ubuntu mainline on a newly updated ubuntu 22.04! But it seems the bug affects all the kernels. It might be related to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958191 Info: Description: Ubuntu 22.04 LTS Release: 22.04 linux-image-5.15.0-30-generic: Installed: 5.15.0-30.31 Candidate: 5.15.0-30.31 Version table: *** 5.15.0-30.31 500 500 http://au.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages 100 /var/lib/dpkg/status ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Attachment added: "lspci.log" https://bugs.launchpad.net/bugs/1973676/+attachment/5590180/+files/lspci.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1973676 Title: flickering and black screen from boot time, no more display after 22.04 upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1973676/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
