Great answer from Paul Henderson _at_ Compaq: tnx Paul !
Summary:
1) Use 'xset -q' to check Xserver DPMS capabilities
2) Check CPU type: EV4 and some EV5 support 'slowdown', EV6 dosn't
_Bye_
---------- Forwarded message ----------
Date: Thu, 31 Aug 2000 09:56:25 -0400
From: Paul Henderson <Paul.G.Henderson_at_compaq.com>
To: Ardizzoni Enrico IW4DZV <enrico_at_unife.it>
Subject: Re: XP1000 and dxpower
Enrico,
When dxpower starts, it will check not only the kernel parameters listed below,
but will call the Xserver to query DPMS capabilities and call the kernel for CPU
slowdown capabilities.
To check DPMS capabilities, do an "xset -q". This will show you (at the bottom
of the listing) the DPMS capabilities. Some current revisions of the Xserver and
some monitors do not support DPMS extensions. Some newer monitors also have
energy saving capabilities built right into the monitor itself, so they do not
support DPMS but rather do the standby, suspend, and power off within their
hardware.
Certain platforms do not support CPU slowdown (code named "sparc mode" ;-). My
AlphaStation XP900, for example, does not support CPU slowdown. CPU slowdown is
a function of the chip architecture revision. So if dxpower is not showing a cpu
slowdown checkbox, the cpu itself is not supporting slowdown, regardless of the
value of the pwrmgr subsystem's cpu_slowdown parameter. I believe EV4 and some
EV5 supported cpu_slowdown, but EV6 does not.
Just about every platform supports disk spindown however. This is a function of
the SCSI architecture and is widely supported in standard scsi drivers.
I checked an XP1000, and it only supports disk spindown. The EV6 chip in the
XP1000 does not support "sparc mode" and the monitor has energy saving
capabilities internally.
Hope this helps.
Paul
--
Paul Henderson
Tru64 UNIX Engineering, Compaq Computer Corporation
mail: Paul.G.Henderson_at_compaq.com || 200 Rt 9, Manalapan, NJ 07726
Ardizzoni Enrico IW4DZV wrote:
>
> Hi Gurus,
> I can't configure DPMS on XP1000 + Tru64 4.0F(PK2) with 'dxpower':
> dxpower shows only "Spin Down Disk".
>
> Dxkerneltuner and sysconfig seems OK:
>
> sysconfig -q pwrmgr
>
> pwrmgr:
> default_pwrmgr_state = 1
> cpu_slowdown = 1
> disk_spindown = 1
> disk_dwell_time = 20
> graphics_powerdown = 1
> graphics_standby_dwell = 20
> graphics_suspend_dwell = 20
> graphics_off_dwell = 60
>
> Any ideas ?
>
> _Bye_
>
> Enrico 8-)
>
> ---<Ferrara University Networking Headquarters>-----------------
>
> ENRICO ARDIZZONI - Key ID 1024D/93A69A1A - http://linux.unife.it
> ________________________________________________________________
>
> KFP = EFE6 E807 C843 EE48 6BBD B58D B4EC F08F 93A6 9A1A
Received on Mon Sep 04 2000 - 09:58:54 NZST