google/sarien (Dell Latitude 5400 Chrome): Panel issues (vertical middle bar, resolution, …)
On the Google Chromebook Dell Latitude 5400 Chrome (google/sarien), enabling developer mode, and flashing a working TianoCore into the firmware’s RW_LEGACY
region using MrChromebox’ ChromeOS Firmware Utility Script, there are now display/panel issues already in Chrome OS’ firmware developer mode screen (and then GRUB). But I though that the Linux kernel drivers are going to correct that, but the problems persist. Linux logs, that a valid VBT is present:
[ 1.857798] i915 0000:00:02.0: [drm:intel_opregion_setup [i915]] Found valid VBT in ACPI OpRegion (Mailbox #4)
Full Linux 5.16-rc4 messages with drm.debug=0xe
After one resume from suspend, the resolution was also quite messed up, and sometimes everything is black with some halo border on the panel.
Edit: Picture of problem with Grml booted: