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Bug#594952: marked as done ([AMILO L7300] no frequency scaling support (BIOS has broken voltage tables and speedstep-centrino doesn't support Dothan))

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has caused the Debian Bug report #594952,
regarding [AMILO L7300] no frequency scaling support (BIOS has broken voltage tables and speedstep-centrino doesn't support Dothan)
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
594952: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=594952
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- Package: linux-image-2.6-686
Version: 2.6.32+28
Computer: Fujitsu-Siemens AMILO L7300

The fact that acpi-cpufreq is not working properly with Dothan CPU's.

FATAL: Error inserting acpi_cpufreq: No such device

cpuinfo:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : Intel(R) Pentium(R) M processor 1.73GHz (Dothan)
stepping : 8
cpu MHz : 598.000
cache size : 2048 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 mtrr pge mca cmov clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx up bts est tm2
bogomips : 1197.07
clflush size : 64

On Ubuntu Karmic/Jaunty all works fine. It uses speedstep_centrino driver, which is deprecated, but works with BIOS which have broken voltage tables..

Link to Ubuntu Patch: http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-maverick.git;a=blobdiff;f=arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c;h=ee4e9f8050752923f9671f61ffbea662bc9ad12a;hp=9b1ff37de46ae6a729f48d2d94ad30548806884d;hb=23120eb5ae5a12924565e8af3d946a015e1caaf9;hpb=215cc71ef0b26b9434404f387681d9bd173d2434

Discussion: https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/132271

Please attach it to main kernel, otherwise many users have to stay with Ubuntu :(



--- End Message ---
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Date: Thu, 24 Nov 2011 00:25:15 -0600
From: Jonathan Nieder <jrnieder@gmail.com>
To: Alexey <nikvart@gmail.com>
Cc: 594952@bugs.debian.org
Subject: Re: linux-image doesn't work properly with Pentium M CPU
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retitle 594952 [AMILO L7300] no frequency scaling support (BIOS has broken voltage tables and speedstep-centrino doesn't support Dothan)
# guessing
found 594952 linux-2.6/2.6.32-21
tags 594952 + upstream
quit

Hi Alexey,

Alexey wrote:

> Computer: Fujitsu-Siemens AMILO L7300
[...]
> FATAL: Error inserting acpi_cpufreq: No such device
[...]
> model name : Intel(R) Pentium(R) M processor 1.73GHz (Dothan)
> stepping : 8
[...]
> On Ubuntu Karmic/Jaunty all works fine. It uses speedstep_centrino driver,
> which is deprecated, but works with BIOS which have broken voltage tables..

See http://bugs.debian.org/638913 for some discussion.

Basically, as you've said, this is a bug in your BIOS.  That does not mean
the problem is hopeless --- it is possible for the kernel to work
around well understood BIOS bugs in the worst cases.

So, to move forward on this:

 - Please attach output from "dmesg" and from "acpidump" from immediately
   after booting.

 - The next step would be to contact linux-acpi@vger.kernel.org and your
   BIOS vendor, to get the bug well documented.  If there is information
   about the bug already online somewhere, that could be helpful.

 - Work with the linux-acpi@ people to come up with corrected ACPI tables.
   Make them available.

 - Finally, if the BIOS vendor is uncooperative, come up with a patch to
   add a "quirk" to use an appropriate hard-coded table to match the
   detected (through DMI, I guess) system.  Or add a kernel command line
   argument to switch between tables, and a tool to detect the right
   table at run time.

Hope that helps,
Jonathan


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