I was able to get the onboard LCD panel working, finally, as follows: First I extracted the edid file from the LCD panel using get-edid and putting that in /lib/firmware/edid/ncp.bin, and then forcing the kernel to take that using the kernel boot option drm.edid_firmware=edid/ncp.bin. This failed, and dmesg said that the ncp.bin file had a "bad block 0". Possibly that means that nothing within Linux can accept edid version 2.4?
Then I grabbed a generic 1920x1080.bin edid file from edid-generator github and put that one in /lib/firmware/edid/ and used that one with drm.edid_firmware and the display worked for the first time! I am still unsure why Linux couldn't accept the version 2.4 edid data from the LCD panel. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1821533 Title: failure to detect and use Intel 620 graphics pci id 3ea0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/1821533/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
