[Bug 59821] Dell M4600 CPU cores locked at 800MHz

[Bug 59821] Dell M4600 CPU cores locked at 800MHz

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=59821


Lan Tianyu <tianyu.lan@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO
                 CC|                            |tianyu.lan@intel.com
          Component|Config-Processors           |cpufreq
         AssignedTo|acpi_config-processors@kern |cpufreq@vger.kernel.org
                   |el-bugs.osdl.org            |
            Product|ACPI                        |Power Management




--- Comment #2 from Lan Tianyu <tianyu.lan@intel.com>  2013-06-17 12:44:37 ---
This should be a cpufreq bug and reassign to the correct category. Could you
try intel_pstate driver?

Please provide the output of acpidump. Thanks.

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[Bug 59821] Dell M4600 CPU cores locked at 800MHz

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https://bugzilla.kernel.org/show_bug.cgi?id=59821





--- Comment #3 from George B. <list1@gir.me.uk>  2013-06-17 12:52:24 ---
(In reply to comment #2)
> Could you try intel_pstate driver?

Not sure how to do this - can you please provide steps?

> Please provide the output of acpidump. Thanks.

root@deli:~ # acpidump
Linux version not implemented yet
Could not get ACPI tables, AE_SUPPORT

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[Bug 59821] Dell M4600 CPU cores locked at 800MHz

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https://bugzilla.kernel.org/show_bug.cgi?id=59821





--- Comment #4 from Lan Tianyu <tianyu.lan@intel.com>  2013-06-17 13:09:27 ---
(In reply to comment #3)
> (In reply to comment #2)
> > Could you try intel_pstate driver?
> Not sure how to do this - can you please provide steps?
Change kernel config file

set CONFIG_X86_INTEL_PSTATE
unset CONFIG_X86_ACPI_CPUFREQ

> > Please provide the output of acpidump. Thanks.
> root@deli:~ # acpidump
> Linux version not implemented yet
> Could not get ACPI tables, AE_SUPPORT
Which kernel version you are using?

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[Bug 59821] Dell M4600 CPU cores locked at 800MHz

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--- Comment #5 from George B. <list1@gir.me.uk>  2013-06-17 13:18:38 ---
root@deli:~ # uname -a
Linux deli 3.9-1-amd64 #1 SMP Debian 3.9.4-1 x86_64 GNU/Linux

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[Bug 59821] Dell M4600 CPU cores locked at 800MHz

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--- Comment #6 from George B. <list1@gir.me.uk>  2013-06-17 17:11:13 ---
Created an attachment (id=105021)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=105021)
grep . /sys/devices/system/cpu/cpu*/cpufreq/* (CONFIG_X86_INTEL_PSTATE)

Seeing similar behaviour after compiling with CONFIG_X86_INTEL_PSTATE enabled,
except when problem occurs CPU speed will go as high as 897000 and when problem
cleared with s2ram as high as 3381000.

Also, many more values are seen in between these, whereas with
CONFIG_X86_ACPI_CPUFREQ the speed is mostly (maybe even always) either 800000
or 3200000.

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[Bug 59821] Dell M4600 CPU cores locked at 800MHz

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--- Comment #7 from Lan Tianyu <tianyu.lan@intel.com>  2013-06-20 06:48:44 ---
 Could you provide what powertop and htop show during CPU cores are stuck at
800Mhz.?
(including these powertop's tabs, Overview   Idle stats   Frequency stats,  
Device stats, Tunables).

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[Bug 59821] Dell M4600 CPU cores locked at 800MHz

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--- Comment #8 from George B. <list1@gir.me.uk>  2013-06-24 09:46:27 ---
Created an attachment (id=105821)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=105821)
htop screenshot (couln't find a way of getting text out)

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[Bug 59821] Dell M4600 CPU cores locked at 800MHz

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--- Comment #9 from George B. <list1@gir.me.uk>  2013-06-24 09:46:55 ---
Created an attachment (id=105831)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=105831)
powertop output

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[Bug 59821] Dell M4600 CPU cores locked at 800MHz

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--- Comment #10 from George B. <list1@gir.me.uk> ---
Do you need me to provide any more information? (Bug is still tagged with
"NEEDINFO".)

I have now disabled SpeedStep in the BIOS and the problem went away.

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[Bug 59821] Dell M4600 CPU cores locked at 800MHz

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Lan Tianyu <tianyu.lan@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |ASSIGNED

--- Comment #11 from Lan Tianyu <tianyu.lan@intel.com> ---
Sorry for later response. This seems a Bios issue. Is there newer Bios verison.

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[Bug 59821] Dell M4600 CPU cores locked at 800MHz

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Lan Tianyu <tianyu.lan@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |DOCUMENTED

--- Comment #12 from Lan Tianyu <tianyu.lan@intel.com> ---
This bug is a Bios issue and can't resolve in the kernel. So close it.

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[Bug 59821] Dell M4600 CPU cores locked at 800MHz

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https://bugzilla.kernel.org/show_bug.cgi?id=59821

Aaron Lu <aaron.lu@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED
                 CC|                            |aaron.lu@intel.com

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