@Severin, I can't answer your question without looking at your firmware.
Can you open a new bug for this?
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Title:
CPU frequency less than HW suppo
@Colin: I was experiencing exactly the same problem on fresh
installations of Ubuntu 12.10 and 13.04 on my HP EliteBook 6930p.
$ cat /sys/devices/system/cpu/cpu0/cpufreq/bios_limit
80
$ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver
acpi-cpufreq
acpi-cpufreq
Your suggestion in comme
I've not had any feedback for several months, so I'm closing this bug.
Please open a new one if the problem persists.
** Changed in: linux (Ubuntu)
Status: Incomplete => Won't Fix
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@Marcello, did the above workaround help?
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Title:
CPU frequency less than HW supported maximum
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Can you try the following:
Edit /etc/default/grub (you need to do this using root privilege) and
change
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash processor.ignore_ppc=1"
and then run:
sudo update-grub
and reboot. Maybe this will work around the is
** Attachment added: "Output of dmidecode (run as root)"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/856233/+attachment/2621628/+files/dmidecode.txt
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@Alex Hung, any idea of why this is happening?
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Title:
CPU frequency less than HW supported maximum
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I've booted the system with processor.ignore_ppc=1 on ubuntu 11.10 x64. The
problem still shows.
Details follow.
root@ubuntu:/home/ubuntu# uname -a
Linux ubuntu 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64
x86_64 x86_64 GNU/Linux
root@ubuntu:/home/ubuntu# cat /etc/lsb-rel
I have tried the processor.ignore_ppc=1 kernel option, without changing any
BIOS settings, but the problem remains as before.
I have made this attempt on the original 10.04 LTS version installed on the HD.
I'll also try with the latest live CD...
# uname -a
Linux davide-desktop 2.6.32-36-generic
Marcello, can you try the kernel option: processor.ignore_ppc=1
..and see if this helps or not.
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Title:
CPU frequency less than HW supported maxi
ubuntu@ubuntu:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.10
DISTRIB_CODENAME=oneiric
DISTRIB_DESCRIPTION="Ubuntu 11.10"
ubuntu@ubuntu:~$ uname -a
Linux ubuntu 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64
x86_64 x86_64 GNU/Linux
ubuntu@ubuntu:~$ cat /sys/d
Sorry for my late reply. I'll try 11.04 and/or 11.10 on monday (I'm not
near the system right now).
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Title:
CPU frequency less than HW supported m
Hi Marcello. Any updates on the system in question?
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Title:
CPU frequency less than HW supported maximum
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As I said in my previous comment, I tried 11.04 on the other system wher
I see this bug (linked some comments ago). On that system I updated the
bios, but the problem was not solved. I plan to try today 11.04 on the
system this bug is about.
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Marcello,
I'm really puzzled now, it seems that the bios_limit is really low - I
will look at the driver again, but my conclusion so far that the BIOS
settings are the root cause to your problem.
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Ooops Sorry, I booted 11.04 into the other PC where I'm seeing the
bug... (To be honest they're almost identical).
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Title:
CPU frequency less
oot@ubuntu:/home/ubuntu# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.04
DISTRIB_CODENAME=natty
DISTRIB_DESCRIPTION="Ubuntu 11.04"
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Ti
root@ubuntu:/home/ubuntu# cat /sys/devices/system/cpu/cpu0/cpufreq/bios_limit
80
root@ubuntu:/home/ubuntu# uname -a
Linux ubuntu 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686
i686 i386 GNU/Linux
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Ok, I will ASAP. Thank you.
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Title:
CPU frequency less than HW supported maximum
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Hi Marcello,
I must say, I'm a little puzzled by this too. I cannot see any _PSS,
_PSD objects in the ACPI tables, which seem to be required for the acpi
cpufreq driver to work, so either acpidump is not getting all the tables
(unlikely) or I've misunderstood the driver.
I believe natty and late
** Changed in: linux (Ubuntu)
Importance: Undecided => Low
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Colin King (colin-king)
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acpi-cpufreq
acpi-cpufreq
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CPU frequency less than HW supported maximum
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Can you tell me what the output from the following command is:
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver
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Title:
CPU frequency less
** Attachment added: "sudo acpidump > acpidump.dat"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/856233/+attachment/2445455/+files/acpidump.dat
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@Marcello, I suspect the ACPI _PSS object may be wrongly listing the
maximum allowed CPU frequencies. Can you attach the output from:
sudo acpidump > acpidump.dat
Thanks
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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>From the other system I was talking about I reported a bug too:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/856375
To maintainers: feel free to mark one of the two bugs as duplicate of
the other. I reported both for completeness, hoping more info would help
the dev team...
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Title:
CPU frequency less than HW supported maximum
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I have another system which is similar to this one and has the same "bug".
The maximum CPU frequency is reached only if I disable the cpu frequency
scaling in the BIOS.
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** Changed in: linux (Ubuntu)
Status: New => Confirmed
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CPU frequency less than HW supported maximum
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This might be a duplicate of
https://bugs.launchpad.net/ubuntu/+source/acpi/+bug/95198
(it is anyway related to that bug).
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Title:
CPU frequency
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