It should be there now, thank you. On Sun, Oct 25, 2026 at 12:25 PM Changwei Zou <[email protected]> wrote:
> Thank you very much for reporting this issue. > Could you please provide more information? > Please boot into the Ubuntu kernel and run the following command in a > terminal > to collect debugging information and attach it to this report. > > $ sudo apport-collect 2171538 > > ** Changed in: linux (Ubuntu) > Status: New => Incomplete > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/2171538 > > Title: > suspend/resume regression in kernel 7.0.0-38 > > Status in linux package in Ubuntu: > Incomplete > > Bug description: > **Title:** Dell Latitude 5590 suspend/resume regression in Ubuntu > kernel 7.0.0-38 (6.17.0-42 works) > > **System** > - Hardware: Dell Latitude 5590 > - BIOS: Dell 1.41.0 > - Distribution: Linux Mint 22.3 Cinnamon (Ubuntu 24.04 base) > - Graphics: Intel Kaby Lake integrated graphics, i915 driver, PCI device > 8086:5917 > - Secure Boot: Disabled > > **Problem** > > The laptop fails to resume from suspend when running kernel > 7.0.0-38-generic. The machine becomes unresponsive, sometimes with the > Caps Lock LED flashing repeatedly. Recovery requires a forced power- > off. > > The problem occurs with both `deep` (S3) and `s2idle` suspend modes. > > **Kernel comparison** > > - 6.14.0-37-generic: Suspend/resume succeeds. > - 6.17.0-42-generic: Suspend/resume succeeds. > - 7.0.0-38-generic: Suspend/resume fails. > > The BIOS was updated from 1.38.0 to 1.41.0 without resolving the > problem in kernel 7.0. > > **Power-management diagnostics under kernel 7.0** > > - `pm_test=devices`: Successful. System returns automatically after five > seconds. > - `pm_test=platform`: System hangs; Caps Lock LED flashes approximately > twice per second. > - Normal suspend: Fails to resume. > > The last persistent journal entry before one failure was: > > `PM: suspend entry (deep)` > > Another failure ended at: > > `PM: suspend entry (s2idle)` > > **Additional observations** > > Kernel 7.0 logs repeated Intel i915 graphics messages, including: > > - `CPU pipe A FIFO underrun` > - `CPU pipe B FIFO underrun` > - `DPLL 1 not locked` > - `i915_hotplug_work_func` exceeding the workqueue reporting threshold > > These errors appear during startup as well, so their relationship to > the suspend failure is unconfirmed. > > **Expected behavior** > > The system should successfully suspend and resume as it does under > kernels 6.14.0-37 and 6.17.0-42. > > **Actual behavior** > > Under kernel 7.0.0-38, the system hangs and requires a forced > shutdown. > > **Workaround** > > Boot kernel 6.17.0-42-generic, which successfully resumes from > suspend. > > **Request** > > Please investigate a possible regression affecting ACPI/platform > suspend or associated device power management between the 6.17 and 7.0 > kernel series. > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2171538/+subscriptions > > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2171538 Title: suspend/resume regression in kernel 7.0.0-38 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2171538/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
