On Fri, 2011-01-21 at 13:23 +0800, Lin Ming wrote: > ---------- Forwarded message ---------- > From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > Date: Fri, Jan 21, 2011 at 12:50 PM > Subject: Occasional (too common) suspend problem > To: "Rafael J. Wysocki" <rjw@xxxxxxx>, Len Brown <lenb@xxxxxxxxxx>, > Jeff Chua <jeff.chua.linux@xxxxxxxxx>, ACPI Devel Maling List > <linux-acpi@xxxxxxxxxxxxxxx>, Linux-pm mailing list > <linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx> > > > So I have one remaining problem on my nasty EeePC problem child > computer, and this one I cannot bisect simply because it's so flaky. > > The exact same kernel may suspend and resume many many times in a row, > and then I reboot it, and it hangs on the first suspend. Very > occasionally the machine comes back when I press a key, and resumes > ok. Most of the time it does not - it's just dead to the world, and > there are no logs to go by. I even tried pm_trace, and that didn't get > me anywhere, although I once got a hash match: > > hash matches drivers/base/power/main.c:555 > > which is the last part of a deivice_resume(), but none of the devices > matched, so that didn't really give any information at all. > > So I have very little to go on. > > However, at least one time when it failed and came back (remember: > very rare), I did get that suspend sequence printouts logged. Here's a > _good_ suspend: > > ... > [ 79.596367] PM: Saving platform NVS memory > [ 79.596378] Disabling non-boot CPUs ... > [ 79.700053] CPU 1 is now offline > [ 79.700565] PM: Restoring platform NVS memory > [ 79.700565] Enabling non-boot CPUs ... > [ 79.700565] Booting Node 0 Processor 1 APIC 0x1 > [ 79.597894] Initializing CPU#1 > ... > > and here's the one that failed and then ended up coming back on a keypress: > > ... > [ 54.628375] PM: Saving platform NVS memory > [ 54.628387] Disabling non-boot CPUs ... > [ 63.554966] ACPI Exception: AE_BAD_PARAMETER, Returned by Handler > for [EmbeddedControl] (20110112/evregion-474) > [ 63.554992] ACPI Error: Method parse/execution failed > [\_SB_.PCI0.SBRG.EC0_.RCTP] (Node f5c2dea0), AE_BAD_PARAMETER > (20110112/psparse-536) > [ 63.555022] ACPI Error: Method parse/execution failed > [\_TZ_.RTMP] (Node f5c32fa8), AE_BAD_PARAMETER (20110112/psparse-536) > [ 63.555047] ACPI Error: Method parse/execution failed > [\_TZ_.TZ00._TMP] (Node f5c34018), AE_BAD_PARAMETER > (20110112/psparse-536) > [ 63.555079] Thermal: failed to read out thermal zone 0 > [ 63.556361] CPU 1 is now offline > [ 63.556944] PM: Restoring platform NVS memory > [ 63.556944] Enabling non-boot CPUs ... > [ 63.556944] Booting Node 0 Processor 1 APIC 0x1 > [ 63.556279] Initializing CPU#1 > ... > > which really doesn't tell me much, except that clearly something in > ACPI-land is unhappy, and it looks thermal-related (that last error > message comes from thermal_zone_device_update()). > > Any ideas? Does revert bba63a29(ACPICA: Implicit notify support) help? Lin Ming > > Linus > _______________________________________________ > linux-pm mailing list > linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx > https://lists.linux-foundation.org/mailman/listinfo/linux-pm _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
