Re: hwclock & /dev/rtc

["Mumia W.." <paduille.4061.mumia.w+nospam@earthlink.net>]

On 06/04/2007 12:54 PM, Bob McGowan wrote:
> Paul Wise wrote:
> > Hi all,
> >
> > [Please CC me, I'm not subscribed]
> >
> > Can anyone tell me why hwclock --directisa works on this laptop (Dell
> > Inspirion) but /dev/rtc does not (linux 2.6.21 from Debian sid)?
> >
> > # hwclock --directisa --show
> > Fri Jun  1 15:36:11 2007  -0.377827 seconds
> > # hwclock  --show
> > select() to /dev/rtc to wait for clock tick timed out
> > # lspci | grep ISA 00:1f.0 ISA bridge: Intel Corporation 82801GBM 
> > (ICH7-M) LPC Interface Bridge (rev 01)
> > # lspci -n  | grep 00:1f.0
> > 00:1f.0 0601: 8086:27b9 (rev 01)
> >
> > Is there a module udev isn't loading that it should be? Or do I need to
> > write a driver for it?
>
> $ lsmod|grep rtc
> rtc                    12372  0
>
> If you get no output, then the rtc driver has not loaded.  But you don't 
> need to write one, try:
>
> modprobe rtc
>
> first.  Then, if hwclock works, you may need to add the driver name to 
> the /etc/modules file.

Paul, if you use a Debian stock kernel, the rtc module is built by 
default, and it should load automatically. Did you build your kernel 
from the source?

Note: I'm a Sarge user.