Bug#542275: rtc-generic not working on Apple PowerBook G4
On Tue, Sep 01, 2009 at 03:08:03AM +0100, Ben Hutchings wrote:
> On Tue, 2009-08-18 at 21:11 +0200, Jordi Mallach wrote:
> > Package: linux-image-2.6.30-1-powerpc
> > Version: 2.6.30-6
> > Severity: important
> >
> > When I boot my G4-based laptop, the hw clock can't be accessed and the system
> > time ends up being the epoch for the platform Jan 1st, 1904.
> >
> > Switching back to 2.6.26 fixes the problem. Although CONFIG_RTC_DRV_GENERIC
> > was compiled in in July, it seems the switch from rtc-ppc to rtc-generic
> > doesn't work, at least on my system. Another Debian PPC user reports the
> > same breakage in his G3.
> >
> > 2.6.26 from lenny:
> > [ 7.800992] platform ppc-rtc.0: rtc core: registered ppc_md as rtc0
> > [ 7.864990] platform ppc-rtc.0: setting system clock to 2009-08-18 18:37:53 UTC (1250620673)
> >
> > Latest 2.6.30 from unstable:
> > [ 6.473202] rtc-generic rtc-generic: rtc core: registered rtc-generic as rtc0
> > [ 6.533547] rtc-generic rtc-generic: hctosys: unable to read the hardware clock
> >
> > Simon Raven, from #debianppc, has a working kernel which after config
> > inspection seems to differ only in the CONFIG_RTC_INTF_DEV_UIE_EMUL=y setting,
> > which is not enabled in Debian.
>
> There's very little difference between rtc-ppc and rtc-generic, and this
> config option should not be required by hctosys. Could you please apply
> this patch and report the error number?
>
> --- a/drivers/rtc/hctosys.c
> +++ b/drivers/rtc/hctosys.c
> @@ -59,7 +59,7 @@
> }
> else
> dev_err(rtc->dev.parent,
> - "hctosys: unable to read the hardware clock\n");
> + "hctosys: unable to read the hardware clock (%d)\n", err);
>
> rtc_class_close(rtc);
>
> --- END ---
Jordi, did you test the patch? Do current unstable kernels work for you?
Cheers,
Moritz
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