Poor Resolution for Subiquity on the EL 300 Remote Console

[Michael Reed]

When attempting a USB or Virtual USB install on 20.04 or 18.04 using subiquity, the console is not readable. The same console is readable when the legacy installer is used.

[Michael Reed (mreed8855)]

This is how the installer looks in the remote console webui.

[Michael Reed (mreed8855)]

This is how the legacy installer looks in the same console

[Michael Hudson-Doyle (mwhudson)]

So following https://wiki.archlinux.org/title/Kernel_mode_setting#Forcing_modes_and_EDID if you switch into grub and stick "drm.edid_firmware=edid/1024x768.bin" on the kernel command line things are a lot more usable. So basically the issue that the monitor being presented to the kernel by the ism firware is too high resolution for our purposes. I wonder if d-i looks better because it forces a video mode? I don't know much about how d-i boots, unfortunately.

[Michael Reed (mreed8855)]

Thanks Michael for taking a look at this, and I will try the drm.edid_firmware options. I will try to followup as to why D-I looks better.

[Michael Reed (mreed8855)]

I have verified this works. Once the system boots into the grub menu, press "e" to enter edit mode and add the line "drm.edid_firmware=edid/1024x768.bin" to the kernel command line as specified in comment #3.