Bug 241765 - em(4) - does not preserve link status across suspend/resume
Summary: em(4) - does not preserve link status across suspend/resume
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 12.1-RELEASE
Hardware: Any Any
: --- Affects Some People
Assignee: freebsd-net (Nobody)
Keywords: IntelNetworking, regression
Depends on:
Reported: 2019-11-06 19:52 UTC by dirkx
Modified: 2019-11-07 13:45 UTC (History)
1 user (show)

See Also:


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Description dirkx 2019-11-06 19:52:54 UTC
With an upgrade to 12.1 (from an early 11) -- the em(4) gigabit wired ethernet drive (on PCI) does not seem to preserve the link status across suspend/resume cycles on various Intel and Dell laptops.

To reproduce/test: 

- default 12.1 minimal install.
- connect no ethernet cable.
- boot (em0 will be up by default)
- 'sudo ifconfig em0 down'
- suspend by closing lid or 'zzz'.
- resume 5 mins later,
- observe that em0 is back up.