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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1928593
Title:
Dell Precision 3560: system hang upon resume from s2idle suspend
Status in linux package in Ubuntu:
Incomplete
Bug description:
On a Dell Precision 3560 with all-Intel graphics (no Nvidia). The
machine will successfully go into s2idle suspend (sleep) but upon
waking, the system will immediately freeze hard. In its frozen state,
the mouse pointer will be visible against a black screen. Here are
the troubleshooting steps I have taken so far:
- Can successfully reproduce under Ubuntu 20.04.2 (gdm3), Kubuntu
20.04.2 (sddm). For what it's worth, I can also reproduce this under
Manjaro (stable), so it's conceivable this is a kernel bug.
- There's some evidence online that this issue, or something similar,
was introduced in/around kernel 5.6.19 -- I have not been able to get
Ubuntu to boot under a kernel earlier than 5.8 so I cannot confirm
this.
- Updated BIOS to latest (1.6). 'Block sleep' is off. System > SATA
is 'AHCI'. Post Behavior > Fastboot is 'Thorough'. Secure Boot is
disabled.
- Determined that this BIOS does not appear to support 'deep' sleep,
only s2idle.
- The problem does NOT occur if I boot to an Ubuntu 20.04.2 live USB
disk. I compared the drivers that are loaded in that environment vs.
those that are loaded under the installed OS and did not notice
anything suspicious.
I am happy to supply any diagnostics or logs that are requested.
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