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amigafan
Tux's lil' helper
Joined: 10 Jul 2003
Posts: 134
Location: Ahrensburg, Germany
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 Posted: Wed Apr 07, 2004 11:26 am Post subject: PowerNow! problem |
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Hello,
I want to enable PowerNow! on my pavilion notebook and found a deamon called powernowd in portage.
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bash-2.05b# /etc/init.d/powernowd start
* Starting powernowd...
powernowd: Couldn't open file /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
/sbin/runscript.sh: line 529: 10982 Speicherzugriffsfehler /usr/sbin/powernowd -q ${POWERNOWD_OPTS}
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And in fact there is no cpufreq/cpuinfo_max_freq in /sys/devices/system/cpu/cpu0/ . cpufreq is compiled into my kernel (2.6.4-gentoo) and the powernow-k7 module is loading during boot.
"Speicherzugriffsfehler" means something like "memory allocation error".
Thanks,
Kai |
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brodo
Guru
Joined: 15 Apr 2003
Posts: 319
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| Posted: Thu Apr 22, 2004 8:08 pm Post subject: Re: PowerNow! problem |
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| amigafan wrote: | | I want to enable PowerNow! on my pavilion notebook and found a deamon called powernowd in portage. |
You need kernel support. Assert that
| Code: | | Power management options (ACPI, APM) ---> |
| Code: | | CPU Frequency scaling ---> |
| Code: | <M> AMD Mobile K6-2/K6-3 PowerNow!
<M> AMD Mobile Athlon/Duron PowerNow!
<M> AMD Opteron/Athlon64 PowerNow!
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are at least set to <M>. Use 2.6.6-rc2-bk1 or later kernel for best results. Then take a look if there's content in /sys/devices/system/cpu/cpu0/cpufreq/
If not, take a look at
| Code: | | dmesg | grep powernow |
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amigafan
Tux's lil' helper
Joined: 10 Jul 2003
Posts: 134
Location: Ahrensburg, Germany
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| Posted: Thu Apr 22, 2004 8:39 pm Post subject: |
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Yes, I had this already but my bios seems to be buggy, because it doesn't find valid pst-tables. The result is that /sys/devices/system/cpu/cpufreq isn't created.
Found a patch for powernow-k7.ko and now its working. |
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brodo
Guru
Joined: 15 Apr 2003
Posts: 319
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| Posted: Fri Apr 23, 2004 7:03 am Post subject: |
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| amigafan wrote: | Yes, I had this already but my bios seems to be buggy, because it doesn't find valid pst-tables. The result is that /sys/devices/system/cpu/cpufreq isn't created.
Found a patch for powernow-k7.ko and now its working. |
If I may ask: what patch? |
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amigafan
Tux's lil' helper
Joined: 10 Jul 2003
Posts: 134
Location: Ahrensburg, Germany
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| Posted: Fri Apr 23, 2004 10:12 am Post subject: |
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I'm sorry:
http://consultmatt.co.uk/nx9005/powernow.php
This one works fine for my pavilion ze4511ea, too.
| brodo wrote: | | amigafan wrote: | Yes, I had this already but my bios seems to be buggy, because it doesn't find valid pst-tables. The result is that /sys/devices/system/cpu/cpufreq isn't created.
Found a patch for powernow-k7.ko and now its working. |
If I may ask: what patch? |
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brodo
Guru
Joined: 15 Apr 2003
Posts: 319
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| Posted: Fri Apr 23, 2004 11:42 am Post subject: |
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But it is quite risky -- I wouldn't do it. Better try out whether the ACPI perflib support in 2.6.6-rc2-bk1 works. |
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amigafan
Tux's lil' helper
Joined: 10 Jul 2003
Posts: 134
Location: Ahrensburg, Germany
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| Posted: Fri Apr 23, 2004 12:46 pm Post subject: |
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Why do you think its risky? Can you give some more information?
| brodo wrote: |
But it is quite risky -- I wouldn't do it. Better try out whether the ACPI perflib support in 2.6.6-rc2-bk1 works. |
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brodo
Guru
Joined: 15 Apr 2003
Posts: 319
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| Posted: Sun Apr 25, 2004 6:58 pm Post subject: |
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| amigafan wrote: | Why do you think its risky? Can you give some more information?
| brodo wrote: |
But it is quite risky -- I wouldn't do it. Better try out whether the ACPI perflib support in 2.6.6-rc2-bk1 works. |
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You assume the same frequency/voltage steps which are valid for a different CPU to work also on your system. However, the steps might be different, and you might either run it at an undefined frequency OR with a too low voltage (=>unstable) OR with a too high voltage => can burn through, I fear. I haven't heard such a report yet; but I wouldn't bet money it doesn't happen. |
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