Messages in this thread | | | Date | Sat, 17 May 2008 23:03:26 +0200 | From | Tobias Diedrich <> | Subject | Re: hibernate event order question |
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Rafael J. Wysocki wrote: > > Now for my question: > > AFAICS the ordering of events is as follows: > > 1) User reqests hibernate > > 2) Tasks are frozen > > 3) Device suspend callbacks get called > > 4) Device resume callbacks get called > > 5) Memory image is written to disk > > 6) Device suspend callbacks get called again to prepare for the system sleep > state.
Hmm, I guess I don't see that because by then the console is disabled or something like that? (It also doesn't help that the system immediately powers down after that) Can I get debugging output during that phase out onto the serial console and/or plain text console & simply turn the poweroff into a halt? (halt in addition to shutdown and reboot in /sys/power/disk might be nice)
The problem is I'm really seeing/have seen multiple issues/situations here: 1) When the device is part of a bridge, connectivity is down after Hibernate 2) Boot->Hibernate->WOL works->Hibernate->WOL only works with byte-reversed MAC-address 3) I have to reconfirm this, but I think after fixing bug 1) with the patch of the previous mail bug 2) turns into 4): 4) WOL doesn't work at all after Hibernate 5) nforce ethernet and netgear switch don't like each other and sometimes negotiate only 100Mbit instead of 1Gbit, while my notebook on a much longer cable never has negotiation problems 6) In the past sometimes negotiation would take very long, that one I haven't seen in some time so I assume it's fixed in recent kernels. This one only happened if both ports were enabled IIRC
"Device suspend callbacks get called again" means I have to retest 3) Maybe I'm imagining things or seeing a heisenbug here?
1) Is fixed by the patch in the previous mail 2) I assume to be related to DEV_HAS_CORRECT_MACADDR, NVREG_TRANSMITPOLL_MAC_ADDR_REV and some magic byteswapping code in the driver. 1) and 2)/4) can be worked around (for the bridge case) by removing the forcedeth module prior to hibernate and reinserting the module and readding the devices to the bridge after resume.
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