Comment 3 for bug 1882337

Ubuntu focal kernel source tree show its hwe-5.8 branch:

Ubuntu-hwe-5.8-5.8.0-25.26_20.04.1 2f89f37fe23d add gamma_set function
Ubuntu-hwe-5.8-5.8.0-25.26_20.04.1 5970af8b58aa add DPMS on/off function
Ubuntu-hwe-5.8-5.8.0-25.26_20.04.1 f2f8653e0d77 xset dpms force off
Ubuntu-hwe-5.8-5.8.0-25.26_20.04.1 9c9a8468de21 Enforce 128-byte stride alignment to fix the hardware limitation
Ubuntu-hwe-5.8-5.8.0-25.26_20.04.1 c3480301d750 Fixed pcie resource conflict between drm and firmware
Ubuntu-hwe-5.8-5.8.0-25.26_20.04.1 29b7216b57f1 Set preferred mode resolution and maximum resolution
Ubuntu-hwe-5.8-5.8.0-25.26_20.04.1 bc17e5574954 Add the mode_valid function
Ubuntu-hwe-5.8-5.8.0-25.26_20.04.1 de3c3ed4c8ff fixed the wrong resolution configurations
Ubuntu-hwe-5.8-5.8.0-25.26_20.04.1 31d6feebec8e Enable the shadowfb for hibmc
Ubuntu-hwe-5.8-5.8.0-25.26_20.04.1 bac511833da9 Add new clock/resolution configurations