Public bug reported:
Purchased new computer. Installed old hard drive. Uefi and grub
working. Installed Ubuntu 18.04, as new install. After installing
software and updates I have not seen Uefi splash or grub since. If I
get into grub or UEFI I have no screen to work from as the HDMI shows
yellow on its status which means no connection. Possibly has DP instead
of HDMI as primary display but cannot test this until I get a suitable
cable DP to HDMI. It seems to me though that the firmware update has
messed this up.
Motherboard has American Megatrends UEFI, Processor is i7.
** Affects: linux-firmware (Ubuntu)
Importance: Undecided
Status: New
** Tags: 18.04
** Tags added: 18.04
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https://bugs.launchpad.net/bugs/1809753
Title:
HDMI screen no signal until ubuntu boots - No uefi, no grub
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