[Bug 10562] New: Powersave feature not available on VIA C7-D CPU's

[Bug 10562] New: Powersave feature not available on VIA C7-D CPU's

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=10562

           Summary: Powersave feature not available on VIA C7-D CPU's
           Product: Power Management
           Version: 2.5
     KernelVersion: 2.6.23
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: cpufreq
        AssignedTo: cpufreq@www.linux.org.uk
        ReportedBy: axelgenus@gmail.com


Latest working kernel version: N/A
Earliest failing kernel version: 2.6.23

Distribution: Gentoo Linux

Hardware Environment:
Motherboard: VIA VB7001G
RAM: 1GB Kingston DDR2 667MHz (runs @533MHz)
HDD: Samsung 500GB SATA

# lspci
00:00.0 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host
Bridge
00:00.1 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host
Bridge
00:00.2 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host
Bridge
00:00.3 Host bridge: VIA Technologies, Inc. PT890 Host Bridge
00:00.4 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host
Bridge
00:00.7 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host
Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA RAID
Controller (rev 80)
00:0f.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge
[KT600/K8T800/K8T890 South]
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237
AC97 Audio Controller (rev 60)
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 78)
01:00.0 VGA compatible controller: VIA Technologies, Inc. UniChrome Pro IGP
(rev 01)

Software Environment:
Gentoo Hardened Server - No X.org

Problem Description:
When I try to insert either "e_powersaver" or "acpi-cpufreq" module, modprobe
tells me "No such device".

Steps to reproduce:
# modprobe e_powersaver
FATAL: Error inserting e_powersaver
(/lib/modules/2.6.23-hardened-r9/kernel/arch/i386/kernel/cpu/cpufreq/e_powersaver.ko):
No such device

# modprobe acpi-cpufreq
FATAL: Error inserting acpi_cpufreq
(/lib/modules/2.6.23-hardened-r9/kernel/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.ko):
No such device

No message seems to be added to both dmesg and syslog.


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[Bug 10562] Powersave feature not available on VIA C7-D CPU's

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=10562





------- Comment #1 from axelgenus@gmail.com  2008-04-27 04:25 -------
I also tried both vanilla kernel versions 2.6.24 and .25.


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[Bug 10562] Powersave feature not available on VIA C7-D CPU's

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=10562





------- Comment #2 from trenn@suse.de  2008-04-28 08:22 -------
Do you run the latest BIOS?
If not, better update and try again.


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[Bug 10562] Powersave feature not available on VIA C7-D CPU's

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=10562





------- Comment #3 from axelgenus@gmail.com  2008-04-29 05:29 -------
I tried to update the BIOS and the VIA flash utility corrupted it! I'm going to
retry when I receive the motherboard's replacement.

There is something I can try that avoids BIOS update? I'm kinda scared... :(


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[Bug 10562] Powersave feature not available on VIA C7-D CPU's

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=10562





------- Comment #4 from rafalbilski@interia.pl  2008-04-29 11:40 -------
Below discussion from Via Arena forums.

> Dear All,
>
> C7-D Model A (1.5/2 GHz) and model D (1.5 Ghz) dosen't support PowerSaver.
> C7-D Model D (1.8/2 GHz) support PowerSaver (P-States P0-P1).
> The e_powersaver driver of kernel 2.6.21-rc6 need to update for new VIA C7/C7D/C7M/Eden Model D CPU.
> VIA is testing it.
> If the driver was tested by VIA QA approval, VIA will deliver it.
And they did. Patch was available from Viaarena. I don't know it's current
state.
>
> BRs,
> Venus

> Hi Venus,
>
> What are the differences between model A and B.
> Also how can I know which I have?
>
> Thanks! 

> Dear nori,
>
> #cat /proc/cpuinfo
>
> Model A CPU=>
>
> processor : 0
> vendor_id : CentaurHauls
> cpu family : 6
> model : 10
> model name : VIA Esther processor 1500MHz
> stepping : 9
> cpu MHz : 800.040
>
> Model D CPU=>
> processor : 0
> vendor_id : CentaurHauls
> cpu family : 6
> model : 13
> model name : VIA C7-M Processor 2000MHz
> stepping : 0
> cpu MHz : 2000.022
>
> BRs,
> Venus


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[Bug 10562] Powersave feature not available on VIA C7-D CPU's

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http://bugzilla.kernel.org/show_bug.cgi?id=10562





------- Comment #5 from axelgenus@gmail.com  2008-04-29 12:03 -------
I found the patch here:
http://www.viaarena.com/default.aspx?PageID=22&DSCat=32&DCatType=3.

Quote from that page: "The voltage can be adjusted on C7 CPU". It doesn't
differ between models.


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[Bug 10562] Powersave feature not available on VIA C7-D CPU's

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http://bugzilla.kernel.org/show_bug.cgi?id=10562


trenn@suse.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |trenn@suse.de
         AssignedTo|cpufreq@www.linux.org.uk    |trenn@suse.de
             Status|NEW                         |ASSIGNED




------- Comment #6 from trenn@suse.de  2008-04-30 03:21 -------
Works for me with a 1,2 GHz Esther CPU (I will post cpuinfo when I am at home).
I didn't check the very details as everything just worked out of the box with
latest openSUSE 11.0.
I have a Jetway mainboard and they have some "default" ACPI implementation put
into their BIOS. Even fan and temperature are exposed via ACPI. Also the
cpufreq states are exposed via ACPI because it's acpi-cpufreq providing
cpufreq.
Therefore I am pretty sure you have an ACPI BIOS problem.
Can you attach dmesg and acpidump output, pls.


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