As the title suggests, I'm seeing horizontal lines on my display - static looking. The lines sometimes appear where the cursor is located.
The issue is intermittent and I was first concerned of hardware damage to the display. I ran both display diags: UEFI advanced and (hold) "D" + Power on.
Results look great with these tests.
I looked at the logs for APT and noted that there was a more infrequent update to oem-somerville-tentacool-meta that occurred right before this started happening and I'm beginning to suspect this package: 22.04Ubuntu6
I wanted to downgrade to Ubuntu5, but it's not listed running
apt list --all-versions. I'm confused by the downgrade process and how these OEM repositories are managed, TBH.
However, I do see this version (and others) in the changelog:
usr>share>doc>oem-somerville-tentacool-meta
I'm frankly guessing about correlation between this update and my display issues. I'm hoping this thread finds someone else experiencing the same.
Thank you
UPDATE
I took everyone's advice and downgraded to kernel 5.15 which seems to correct the issue. To make my life easier during system boot, I purged 5.19 using:
sudo apt purge <kernel>
sudo apt autoremove --purge
I take it that everyone's SOP is to sudo apt full-upgrade? I see that can cause some issues
For the short term, I'm going to be installing piece meal via the package manager.
My experience with Dell support was not good. I understand the tiered support often cannot assist at level one, but there seems to be no Linux specific escalation personnel. Luckily, we're savvy
Update 2
I have been testing RC kernels and began to see good behavior with 5.19.0.3035-generic. I.e., no artifacts with an unedited grub file.
https://people.canonical.com/~khfeng/lp2002986-2/
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2007516
I also received a phone call from Dell's Resolution Expert Center. Great experience chatting with a knowledgeable engineer who is tracking this bug. There is just a lot of red tape before a user can get to this next level. The official fix is to still add a parameter to etc/default/grub.
This line
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
Becomes
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_psr=0"
I can confirm that this also works.
