Bug 10817

Summary:	COMRESET on resume where SATA link power management is enabled
Product:	Power Management	Reporter:	Chris Jones (cmsj)
Component:	Hibernation/Suspend	Assignee:	power-management_other
Status:	CLOSED CODE_FIX
Severity:	normal	CC:	akpm, bugs1k.noblesmith, htejun, jgarzik, kristen.c.accardi, shaohua.li, storvann+kernel
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.24-17-generic	Subsystem:
Regression:	---	Bisected commit-id:
Bug Depends on:
Bug Blocks:	7216

Description Chris Jones 2008-05-29 03:35:54 UTC

Using Ubuntu 8.04 I get a slow resume from suspend with a COMRESET error for my drive if I have previously enabled sata link power management.

Does this explicitly need to be disabled before suspending, or should the kernel be handling this situation by explicitly waking up the link on resume?

Comment 1 Andrew Morton 2008-05-29 08:47:55 UTC

I guess this is a SATA problem.  Perhaps ALPM?

Comment 2 Chris Jones 2008-10-10 10:16:16 UTC

It is indeed ALPM, and having moved from 2.6.24 to 2.6.27, the problem has gone away.

Comment 3 Tejun Heo 2008-10-12 23:59:24 UTC

Yeah, prefer-COMRESET patch must have fixed this problem.