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Excuse the brevity, I'm travelling and my only device (other than my phone) is now broken.
I've got an old-ish surface pro. Intel graphics using KMS. After a system update, the display is gray and "vibrates". It is fine when I input my decryption password, and I can see some boot lines fly by. Then the screen goes black, and when it comes back, it is glitchy.
I can adjust my kernel boot line and run commands blind, but can't read any output. I've tried installing various drivers and rebooting (xf86-video-{intel,vesa,fbdev}). "nomodeset" hangs the boot. Switching to a non-X TTY does not help.
I've no bootable media. Any advice is appreciated, even if just a clever trick to run commands and see output with a borked display.
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pic or didn't happen (you've a phone, you've a cma ;-)
nomodeset will break graphical targets, but you can still boot the multi-user.target, https://wiki.archlinux.org/index.php/Sy … _boot_into
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Ye of little faith. Here's a video:
https://photos.app.goo.gl/64prNks8PKN53ovd9
Thanks for the tip though. With `systemd.unit=mutli-user.target nomodeset` I get a readable TTY.
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With that, I was able to roll back the kernel (5.1.2.arch1-1->5.0.13.arch1-1) and the display is working again.
I suppose I'll mark this solved, but I'll post back if I figure out anything more about why it broke.
Thanks again!
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Looks like a frequency issue, maybe power saving?
https://wiki.archlinux.org/index.php/In … flickering
Is the text of a different resolution between kernel versions?
You can also install the LTS kernel and keep the main kernel "broken" for further investigations.
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I tried `i915.enable_psr=0`, but no luck. It is hard to tell if it is a different resolution, as it is barely readable at all. It doesn't seem noticeably smaller/larger though.
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The resolution would directly translate to the font size.
More power saving stuff:
i915.enable_dc=0 i915.enable_fb=0 i915.enable_ips=0
As well as
i915.disable_power_well=0|1
(the default is -1, "auto" and I've no idea whether this could impact the behavior in either direction)
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Tried all of those parameters (both 0 and 1 for power_well) and nothing helped.
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