Bug 219477 - Lunar Lake periodically stutters unless intel_idle.max_cstate=1 is set - HP OmniBook Ultra Flip Laptop 14
Summary: Lunar Lake periodically stutters unless intel_idle.max_cstate=1 is set - HP O...
Status: CLOSED DUPLICATE of bug 219364
Alias: None
Product: Power Management
Classification: Unclassified
Component: intel_idle (show other bugs)
Hardware: Intel Linux
: P3 normal
Assignee: Len Brown
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-11-06 21:14 UTC by Bryan H.
Modified: 2024-11-08 01:29 UTC (History)
0 users

See Also:
Kernel Version:
Subsystem:
Regression: No
Bisected commit-id:


Attachments
Linux build config (270.77 KB, text/plain)
2024-11-06 21:14 UTC, Bryan H.
Details
test X86_BUG_MONITOR patch (1.16 KB, patch)
2024-11-07 20:31 UTC, Len Brown
Details | Diff
System specifics (1.01 KB, text/plain)
2024-11-07 22:28 UTC, Bryan H.
Details

Description Bryan H. 2024-11-06 21:14:43 UTC
Created attachment 307167 [details]
Linux build config

On an Intel Core Ultra 7 258V running Linux 6.12-rc6, there is periodic stuttering at any time from boot, including in a virtual terminal. These stutters can range from a second or a little longer than a second, but never an unrecoverable freeze.

Additionally, when listening to music, these stutters can cause audio to cut out and become choppy.

When intel_idle.max_cstate=1 is set, this issue seems to resolve itself.

An easy way to replicate this issue is to move a cursor around on a screen, start typing in an application like LibreOffice, and the user will likely encounter a stutter in 5 minutes or less.
Comment 1 Len Brown 2024-11-07 20:31:06 UTC
Created attachment 307179 [details]
test X86_BUG_MONITOR patch

please try this patch

Also, I'll be interested in the specifics of your system.
Can you please share the output from

grep . /sys/class/dmi/id/*
Comment 2 Bryan H. 2024-11-07 22:28:15 UTC
Created attachment 307183 [details]
System specifics
Comment 3 Bryan H. 2024-11-07 22:29:59 UTC
(In reply to Len Brown from comment #1)
> Created attachment 307179 [details]
> test X86_BUG_MONITOR patch
> 
> please try this patch
> 
> Also, I'll be interested in the specifics of your system.
> Can you please share the output from
> 
> grep . /sys/class/dmi/id/*

The provided patch seems to have resolved the issue, as I've been testing it for about an hour or so, and haven't seen a single stutter.

I have uploaded my system specifics as an attachment.

Thank you very much!
Comment 4 Len Brown 2024-11-08 01:29:27 UTC

*** This bug has been marked as a duplicate of bug 219364 ***

Note You need to log in before you can comment on or make changes to this bug.