Ubuntu
linux-hwe package

  1. Bug #1821533
  2. Comment #16

Comment 16 for bug 1821533

Revision history for this message
Rich Drewes (drewes) wrote : Re: failure to detect and use Intel 620 graphics pci id 3ea0

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.