Public bug reported:
I'm raising this bug to report an issue (possible regression) in the
7.0.0-38 kernel that causes resume from suspend to fail. Relevant
details below, and extensive logs attached.
Hardware:
- NVIDIA GTX 1080
- Zorin OS 18.1 (based on Ubuntu Noble)
- NVIDIA 580.178.04
Regression:
- Suspend/resume works on 7.0.0-34
- Suspend/resume fails on 7.0.0-38
Observed behavior:
- System enters suspend
- Journal shows "PM: suspend entry (deep)"
- System never resumes
- Requires hard reset
Testing performed:
- Booted into 7.0.0-34 - suspend/resume work as-expected
- Boot into 7.0.0-38 - suspend works, fails to resume
- Boot into 24.04 live USB - suspend/resume work (though other, unrelated,
issues are present)
Regression: Yes
Last known good:
7.0.0-34-generic
First known bad:
7.0.0-38-generic
Reproduction rate:
100%
Steps:
1. Boot 7.0.0-38-generic
2. Login
3. Execute: systemctl suspend
4. System enters deep sleep
5. Attempt wake using keyboard, mouse, or power button
6. System never resumes
7. Hard reset required
Control test:
Boot 7.0.0-34-generic
Repeat same steps
Suspend/resume works normally
Expected behavior:
- Resume successfully from suspend on 7.0.0-38 as on 7.0.0-34
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "Extensive kernel regression diagnostics logs"
https://bugs.launchpad.net/bugs/2170904/+attachment/6009301/+files/kernel_regression_20261014_162953.tar.gz
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https://bugs.launchpad.net/bugs/2170904
Title:
Regression: System hangs on resume from suspend with 7.0.0-38-generic,
works correctly with 7.0.0-34-generic
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