On Thu, 26 Jun 2014 07:44:35 -0400, Anthony Jenkins wrote:
> On 06/25/2014 18:29, Bykov Vladislav wrote:
> > Hello.
> >
> > I have a problem with ACPI on HP Envy 4 that causes in impossible
> > shutdown. It
> > reaches an error while prepairing to shutdown, and reboots the machine.
> >
> > I already did sent a bug report about 2-3 months ago, but things doesn't
> > seems
> > to move on.
> >
> > Here's an error when booting the machine:
> >
> > ACPI Error: No handler for Region [RCM0] (0xfffffe0002b0f800)
> > [SystemCMOS] (20110527/evregion-421)
> > ACPI Error: Region SystemCMOS (ID=5) has no handler
> > (20110527/exfldio-310)
> > ACPI Error: Method parse/execution failed [\134_SB_.WMID.ESDT] (Node
> > 0xfffffe0002aee440), AE_NOT_EXIST (20110527/psparse-560)
> > ACPI Error: Method parse/execution failed
> > [\134_SB_.PCI0.LPCB.EC0_._Q42] (Node 0xfffffe0002b16d40), AE_NOT_EXIST
> > (20110527/psparse-560)
> > acpi_ec0: evaluation of query method _Q42 failed: AE_NOT_EXIST
> >
> > And here's the one when I'm trying to shut it down:
> >
> > usbus2: Controller shutdown complete
> > ACPI Error: No handler for Region [RCM0] (0xfffffe0002b15900)
> > [SystemCMOS] (20110527/evregion-421)
> > ACPI Error: Region SystemCMOS (ID=5) has no handler
> > (20110527/exfldio-310)
> > ACPI Error: Method parse/execution failed [\_SB_.WMID.ESDT] (Node
> > 0xfffffe0002af5800), AE_NOT_EXIST (20110527/psparse-560)
> > ACPI Error: Method parse/execution failed [\_PTS] (Node
> > 0xfffffe0002af86c0), AE_NOT_EXIST (20110527/psparse-560)
> > acpi0: AcpiEnterSleepStatePrep failed - AE_NOT_EXIST
> > Rebooting...
> >
> > I've tried FreeBSD 9, FreeBSD 10, and -CURRENT. All have the same problem.
>
> Here's a case where my patch to implement the SystemCMOS region
> handler should help; it allows my HP Envy to power down and allows it
> to suspend/resume except the LCD backlight doesn't come back when
> resuming. Biggest problem with the patch IMHO is I'm stealing
> ("borrowing") from the real time clock (RTC) I/O region, but I don't
> think we have an "actual" FreeBSD driver for that.
>
> Reposting here, or search this list for "Naive implementation of
> AcpiExCmosSpaceHandler", let me know if it doesn't apply cleanly to
> your version of FreeBSD . I've posted it upstream to the acpica
> mailing list, but no response.
>
> diff --git a/source/components/events/evhandler.c
> b/source/components/events/evhandler.c
Interesting. I wonder if this is needed for reading the RTC for the
time on boot, and writing it back on shutdown - which I would have
thought too generic to have left out on any machine? Or is this perhaps
retrieving at boot then restoring at shutdown some other system-specific
information in NVRAM?
If the latter, then the usage in /sys/dev/acpi_support/acpi_ibm.c
revealed below might illustrate another way of dealing with this?
% find /sys/ -type f -exec egrep -H 'rtcin|writertc' {} \; | grep -v
drm_mode_set_crtcinfo
shows everything using the rtcin() and writertc() functions, implemented
for x86 at least in /sys/x86/isa/atrtc.c .. but I have no idea whether
you can access those functions from where / when you're tinkering here.
Yours looks more likely portable for upstream acpica, but it also looks
potentially quite dangerous 'in the wrong hands' :)
cheers, Ian
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