Fix RPL-U CPU C-state alway keep at C3 when system run PHM with idle screen on

Bug #2042385 reported by koba
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
HWE Next
New
Undecided
Unassigned
linux (Ubuntu)
Status tracked in Noble
Jammy
Invalid
Undecided
Unassigned
Noble
In Progress
Undecided
koba
linux-oem-6.5 (Ubuntu)
Status tracked in Noble
Jammy
Fix Committed
Undecided
koba
Noble
Invalid
Undecided
Unassigned

Bug Description

[Impact]
RPL-U CPU C-state alway keep at C3 when system run PHM with idle screen on.

[Fix]
Realtek r8168h/r8111's ASPM is blocked due to users report the regression on their platform[0].
Add quirks for some Dell Platforms to enable ASPM and allow RPL-U sleep deeper.

[0], https://bugzilla.kernel.org/show_bug.cgi?id=217814

[where the issue could happen]
Medium, may have the regression but the risk is limited in some Dell platforms.
we will ask Realtek's effort once the regression is observed.

koba (kobako)
summary: - Fix CPU C-state alway keep at C3 when system run PHM with idle screen on
+ Fix RPL-U CPU C-state alway keep at C3 when system run PHM with idle
+ screen on
description: updated
description: updated
Changed in linux-oem-6.5 (Ubuntu Jammy):
status: New → In Progress
assignee: nobody → koba (kobako)
koba (kobako)
tags: added: oem-priority originate-from-2038398 somerville
koba (kobako)
description: updated
koba (kobako)
Changed in linux (Ubuntu Noble):
status: New → In Progress
assignee: nobody → koba (kobako)
Timo Aaltonen (tjaalton)
Changed in linux-oem-6.5 (Ubuntu Jammy):
status: In Progress → Fix Committed
Changed in linux-oem-6.5 (Ubuntu Noble):
status: New → Invalid
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote :

This bug is awaiting verification that the linux-oem-6.5/6.5.0-1008.8 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-oem-6.5' to 'verification-done-jammy-linux-oem-6.5'. If the problem still exists, change the tag 'verification-needed-jammy-linux-oem-6.5' to 'verification-failed-jammy-linux-oem-6.5'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

tags: added: kernel-spammed-jammy-linux-oem-6.5-v2 verification-needed-jammy-linux-oem-6.5
koba (kobako)
Changed in linux (Ubuntu Jammy):
status: New → Invalid
Revision history for this message
koba (kobako) wrote :

Verified with CID:202309-32128,
~~~
$ uname -a
Linux 6.5.0-1008-oem #8-Ubuntu SMP PREEMPT_DYNAMIC Fri Nov 10 13:08:33 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
~~~
$ sudo cat /sys/kernel/debug/pmc_core/slp_s0_residency_usec
0
$ sudo rtcwake -m mem -s 5
$ sudo cat /sys/kernel/debug/pmc_core/slp_s0_residency_usec
4017704
~~~

tags: added: verification-done-jammy-linux-oem-6.5
removed: verification-needed-jammy-linux-oem-6.5
Revision history for this message
Riley Kao (riley-kao) wrote :

Verified SENRTY V16

~~~
$ uname -a
Linux test-Vostro-16-5640 6.5.0-1008-oem #8-Ubuntu SMP PREEMPT_DYNAMIC Fri Nov 10 13:08:33 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
~~~
$ sudo cat /sys/kernel/debug/pmc_core/slp_s0_residency_usec
0
$ sudo rtcwake -m mem -s 5
$ sudo cat /sys/kernel/debug/pmc_core/slp_s0_residency_usec
4117866
~~~

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