*** This bug is a duplicate of bug 1821820 ***
https://bugs.launchpad.net/bugs/1821820
So I'm not sure if this bug is actually a duplicate after all. I've
done a fresh install of 19.04 and upgraded to kernel 5.0.0-11.12 (which
supposedly fixed the other bug), and the link training issues with my
Dell XPS 9575 laptop panel are still present. So it looks like the
primary issue i'm experiencing has not yet been resolved.
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https://bugs.launchpad.net/bugs/1824216
Title:
Linux 5.0 regression i915 module, black screen on boot for certain
laptop panels
Status in linux package in Ubuntu:
Confirmed
Bug description:
On my Dell XPS 9575, I get a black screen on boot when running the
19.04 live image, OR after updating from 18.10 to 19.04. It appears
to be a kernel related bug that was introduced in 5.0 that is affected
by certain laptop panels not conforming to their stated
specifications.
Several other Dell systems exhibit the same issue, and it's very
possible that there are other panels used on other systems that will
also have the same issues.
Intel is aware of this issue and has already created a patch. You can
see the relevant threads here:
https://bugs.freedesktop.org/show_bug.cgi?id=109959
And the patch here:
https://patchwork.freedesktop.org/patch/296411/
It would be fantastic to get this patch applied before release, as it
would be very difficult install 19.04 on the affected systems
otherwise. I was able to get the live image booted by adding the
nomodeset kernel parameter to grub, so as a work around you can use
this approach to install.
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