Lunar Lake (Arc 130V/140V) graphic freezing on resume from suspend

Ask Fedora
1

Hey everyone,

I’ve got a laptop with a Lunar Lake CPU (Intel Core Ultra 200V, Arc Graphics 130V/140V) running Fedora, and I’ve been fighting a really annoying issue: every time I resume from suspend, the system graphic freezes and becomes unusable. So I need to perform manual reboot.

Here’s my setup:

  • CPU/GPU: Intel Core Ultra 200V (Lunar Lake), lspci shows: 00:02.0 VGA compatible controller: Intel Corporation Core Ultra 200V Series Processors Arc Graphics 130V/140V GPU (rev 04)
  • Driver: xe
  • Kernel: 7.1.8, so this is not some old-kernel issue that’s already been fixed
  • Suspend mode is s2idle

I went digging and it looks like this isn’t just me. there’s a decent amount of chatter about Lunar Lake having trouble with resume from deep s2idle (PC10), possibly a firmware/C-state issue rather than a pure driver bug:

One thing I found interesting: someone in one of those threads tested this by disabling specific BIOS options one at a time, and narrowed it down to CPU Power Management and intel SpeedStep. Turning those two off (and leaving everything else alone) got rid of the freezing entirely, but battery drain during suspend went up noticeably (roughly 1.5-2%/h instead of 0.3-0.5%/h). So it really seems like this is about CPU C-state transitions on resume, not the xe driver being broken on its own.

So, a few questions for anyone who’s run into this:

  • Is anyone else seeing this on Fedora specifically with Lunar Lake / Arc 130V-140V?
  • Has anyone found a workaround that doesn’t tank battery life as much, a specific intel_idle.max_cstate value, a narrower BIOS tweak, anything like that?
  • Is this already being tracked somewhere upstream (kernel bugzilla, drm/xe gitlab) that’s worth piling onto instead of starting fresh here?

Happy to grab more logs if it helps track this down.

2

What values of Cstate have you tried thus far and at what level does the issue cease to be?

3

I haven’t run the full sweep myself yet, but someone else with similar Lunar Lake hardware already narrowed it down, and it lines up with what’s been reported elsewhere in this thread:

  • intel_idle.max_cstate=2 → stable, no freezes. Battery drain during sleep was about 8% over 8 hours (~1%/h).
  • intel_idle.max_cstate=3 → the freeze/reboot comes back.