Hacking the LG Monitor's EDID

CommunityNews · 31 August 2023 11:28

Hacking the LG Monitor’s EDID.
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Hacking the LG Monitor's EDID.md

**preface**: Posting these online since it sounds like these notes are somewhat interesting based on a few folks I've shared with. These are semi-rough notes that I basically wrote for myself in case I ever needed to revisit this fix, so keep that in mind.

I recently bought an LG ULTRAGEAR monitor secondhand off of a coworker. I really love it and it's been great so far, but I ran into some minor issues with it in Linux. It works great on both Mac and Windows, but on Linux it displays just a black panel until I use the second monitor to go in and reduce the refresh rate down to 60 Hz.

This has worked decent so far but there's some issues:

* It doesn't work while linux is booting up. The motherboards boot sequence is visible just fine, but as soon as control is handed over to Linux and I'd normally see a splash screen while I'm waiting for my login window, I see nothing.
* It doesn't work on the login screen. This would be fine if login consistently worked on my second screen, but I need to manually switch the cables between my work computer and the desktop for the second screen and sometimes I don't feel like doing that. Even when I switch the cables, the second screen seems to be moody and doesn't always show the login screen either.
* Once I've logged in and fixed the settings on my second screen it seems to go fine, unless I actually unplug the second screen. If I do, it looks like the graphics settings go reset back to default (settings that don't work) and I lose the main monitor too.

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