Title: System Freeze Post Suspend with Browser and Sensor App Open

[Daniel Morales Salazar]

I've encountered a recurring system freeze issue on my Ubuntu machine. The system was left unattended with two instances of Firefox open, one on ChatGPT and another on Coursera, as well as the hardware sensor notification program running. Upon returning and resuming from suspend, I was able to log in, but the system was entirely unresponsive. Ctrl-Alt-Delete resulted in a system reboot. This issue had ceased occurring for about a week but has now reappeared.

Previously, similar freezes would occur, but Ctrl-Alt-Delete led to a black screen requesting login details, necessitating a forced shutdown. There is a possibility that the open applications may be contributing to the freezing issue, although the problem had paused for several days before returning, which is puzzling. This intermittent nature of the problem adds complexity to pinpointing the exact cause.

Steps to Reproduce:
1. Leave the system idle with Firefox open on ChatGPT and Coursera.
2. Run the hardware sensor notification program.
3. Enter system suspend state.
4. Resume from suspend after an extended period.
5. Attempt to interact with the system post-login.

Expected Result:
The system should resume from suspend and allow normal operation without freezing.

Actual Result:
The system becomes unresponsive after resuming from suspend, requiring a reboot via Ctrl-Alt-Delete or, in previous instances, necessitating a forced shutdown after a black screen appears.

Additional Information:
- Occurrences have been intermittent, with a period of one week where the issue did not manifest.
- The problem may be related to the system suspend/resume process, potentially exacerbated by the running applications at the time of suspend.

This summary should provide a concise and clear description of the issue for a bug report, outlining the problem, the steps to reproduce it, and the unexpected behavior experienced.

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: linux-image-6.5.0-17-generic 6.5.0-17.17
ProcVersionSignature: Ubuntu 6.5.0-17.17-generic 6.5.8
Uname: Linux 6.5.0-17-generic x86_64
ApportVersion: 2.27.0-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: qd91 2735 F.... wireplumber
 /dev/snd/seq: qd91 2715 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Feb 20 16:32:25 2024
InstallationDate: Installed on 2024-02-08 (12 days ago)
InstallationMedia: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.2)
MachineType: {report['dmi.sys.vendor']} {report['dmi.product.name']}
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.5.0-17-generic root=UUID=02738a08-52ac-4d19-88c9-cacd3b303bbb ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-6.5.0-17-generic N/A
 linux-backports-modules-6.5.0-17-generic N/A
 linux-firmware 20230919.git3672ccab-0ubuntu2.5
SourcePackage: linux
UpgradeStatus: Upgraded to mantic on 2024-02-10 (11 days ago)
dmi.bios.date: 11/10/2023
dmi.bios.release: 1.33
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.33.0
dmi.board.name: 0772C9
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.33.0:bd11/10/2023:br1.33:svnDellInc.:pnLatitude5420:pvr:rvnDellInc.:rn0772C9:rvrA00:cvnDellInc.:ct10:cvr:sku0A20:
dmi.product.family: Latitude
dmi.product.name: Latitude 5420
dmi.product.sku: 0A20
dmi.sys.vendor: Dell Inc.

[Daniel Morales Salazar (qd91)]

Here are my logs from the time of the issue. Thank you very much for your kind consideration.

[Daniel Morales Salazar (qd91)]

Recently observed that my computer becomes unusually warm during the Suspend state, more so than under normal operation. Given the intermittent nature of the Suspend issue previously reported, I've opted to disable Suspend functionality as a precaution. I thought it important to update this report with these observations. It would be greatly appreciated if these concerns could be addressed in future updates, enhancing the system's reliability and user experience. Thank you for your ongoing efforts in improving Ubuntu (and Linux).