6 ms·

My work machine, a Precision 5550 (XPS 15) has never been able to reliably wake from sleep. Ubuntu, Pop!_OS, Windows 11- it doesn’t matter.

• csdvrx 3y ago
  > never been able to reliably wake from sleep. Ubuntu, Pop!_OS, Windows 11- it doesn’t matter. Same, with other Dells. There was one where I analyzed the BIOS ACPI tables and concluded it was impossible to wake from sleep on any OS, due to bugs I've found: I can't find my old post, but https://www.reddit.com/r/Dell/comments/kolf5f/patching_the_dsdt_table_to_enable_s3_suspend_on/ https://www.reddit.com/r/Dell/comments/kolf5f/patching_the_d... is a good summary. Error on Dell ACPI tables are usual: for the 5510, see https://gist.github.com/jamal-fuma/17d2d605280a52376326384c4bd0380b https://gist.github.com/jamal-fuma/17d2d605280a52376326384c4... I also remember someone doing deeping ACPI table modifications to limit the power draw on the Xeon Laptops. I can't find the link right now, but IIRC it was related to the PCH powergating. These issues plague the whole line. For another analysis (and confirmation), this time on how deep C states (very important for temperature and for sleep) can only be reached one after boot, see https://www.dell.com/community/en/conversations/precision-mobile-workstations/7760-linux-no-suspend-to-ram-shallow-cstates-pain/647f9deaf4ccf8a8de269007 https://www.dell.com/community/en/conversations/precision-mo...