Re: Regression: suspend to ram completely broken since at least 3.13-rc5, works with 3.12.

From: Volker Armin Hemmann
Date: Tue Dec 02 2014 - 12:31:29 EST

Am 02.12.2014 um 15:46 schrieb Pavel Machek:
> Hi!
>> with kernel 3.12.X with X tested up to .23 suspend to ram works
>> flawlessly. My machine suspends quickly and wakes up reliably, giving me
>> uptimes measured in weeks.
>> Every kernel I tried between 3.13.0-rc5 and 3.16.7 on the other hand
>> shows this behaviour:
>> IF suspend works it takes ages. Video blanks quickly, harddisks are
>> turned off, then it is stuck for a long time (more minute than tens of
>> seconds), and at some point suspends.
>> Afterwards there is a 50% chance it will wake up. In that case: nothing
>> in dmesg.
>> If it does not wake up on pressing any button, I have to press power
>> button for a nice cold boot.
>> Even if it does suspend and resume successfully, it will NOT suspend the
>> next time. Never.
>> The much more likely failure mode looks like this:
>> It will blank video and turn of harddisks and then nothing happens. usb
>> dead, ps2 keyboard dead, no harddisk activity, fans are spinning,
>> mainboard is powered - and nothing happens. I can turn off or hit reset
>> button.
>> Of course, after a reboot nothing will show up in the logs.
>> So this is a severe regression. Box worked, it stopped working.
> Any chance to do a bisect? Any chance to try with minimum drivers?
> Pavel

hadn't had the time yet. Will do the bisect run this weekend.

Glück Auf,


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at