[Bug]: LG gram Meteor Lake stalls during boot on linux-cachyos 7.0.0-1 unless i915.enable_psr=0

Hardware:

  • LG gram laptop
  • Intel Meteor Lake iGPU

Problem:
After updating, the system stalls during boot on linux-cachyos 7.0.0-1.

What works:

  • linux-cachyos-lts 6.18.22-1 boots
  • linux-cachyos 7.0.0-1 also boots if I add: i915.enable_psr=0

What does not work:

  • linux-cachyos 7.0.0-1 without i915.enable_psr=0 freezes during boot

Workaround:

  • Add i915.enable_psr=0 to the kernel command line

Kernel/package versions:

  • linux-cachyos 7.0.0-1
    linux-cachyos-lts 6.18.22-1
    mesa 2:26.0.5-4
    linux-firmware 1:20260309-1

System info:

  • Linux cachyos-x8664 7.0.0-1-cachyos #1 SMP PREEMPT Fri, 17 Apr 2026 11:49:42 +0000 x86_64 GNU/Linux

Logs:

Extra notes:

  • This appears to be a boot regression on this hardware with the regular CachyOS kernel.
  • LTS works.