Messages in this thread | | | Subject | Re: Samsung Series 9 won't resume | From | Zan Lynx <> | Date | Wed, 05 Oct 2011 15:19:50 -0600 |
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On Mon, 2011-10-03 at 12:35 +0530, Srivatsa S. Bhat wrote: > On 10/01/2011 01:39 AM, Zan Lynx wrote: [snip] > > Instead it seems to involve reboots, which is crazy. From a cold > > power-on start, suspend resume will always fail. But if the laptop is > > rebooted first, suspend and resume appear to work. What the heck? I have > > no clue how to debug this. > > Could you provide any error logs you found? That could give us a clue as to > what is going wrong...
Sorry for the delayed response.
No, there were no error logs. I even tried the suspend debugging which is supposed to write into the clock registers.
The symptom is that suspend appears to work correctly. Everything powers down and the power light slowly flashes on and off. When the power button is pressed to trigger resume, the fans come on, the power light comes on full, but there is no hard drive activity and the screen does nothing.
After forcing a power-off and rebooting, when using the "echo 1 > /sys/power/pm_trace" trick, the system has nothing in the dmesg about resume failures. I have to wonder if it even started executing the resume.
Other interesting info is that I have the laptop using UEFI and the default reboot causes a kernel panic, so I have the kernel option "reboot=k" set.
I just thought of this, could the EFI services be messing up the RTC programming that pm_trace uses?
I suppose that I should also test suspend resume without UEFI, in BIOS mode. Such a pain. -- Knowledge Is Power Power Corrupts Study Hard Be Evil [unhandled content-type:application/pgp-signature] | |