[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 Zhang Rui changed: What|Removed |Added Assignee|acpi_b...@kernel-bugs.osdl. |rui.zh...@intel.com |org | -- You are receiving this mail because: You are watching the assignee of the bug. -- October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60134071&iu=/4140/ostg.clktrk ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742
Zhang Rui changed:
What|Removed |Added
Status|REOPENED|RESOLVED
Resolution|--- |DOCUMENTED
--- Comment #20 from Zhang Rui ---
Method (_PSR, 0, NotSerialized)
{
If (POWS)
{
Return (One)
}
Else
{
If (LLess (MDCH, 0x0B))
{
Or (0x11, PTHR, PTHR)
Notify (\_PR.P001, 0x80)
Sleep (0x0A)
Notify (\_PR.P002, 0x80)
}
Return (Zero)
}
}
AFAICS, this is a BIOS problem to me.
the PTHR is not set properly when AC is reconnected, and this results in
Method (_PPC, 0, NotSerialized)
{
If (LEqual (And (\PTHR, 0x01), 0x01))
{
Return (Subtract (SizeOf (SPSS), 0x01))
}
Else
{
Return (0x00)
}
}
the _PPC method returns an non-zero value that limits the cpu frequency.
Bug closed as there is nothing from OS side.
Rogério Brito,
please use processor.ignore_ppc=1 to workaround this issue. BTW, surely I can
modidy the DSDT table to fix the AML code, but this is not preferred as you
need to rebuild your kernel every time when you want to use a new kernel
released. :)
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[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 Rogério Brito changed: What|Removed |Added Status|CLOSED |REOPENED Resolution|INSUFFICIENT_DATA | --- Comment #19 from Rogério Brito 2013-05-16 05:02:24 --- Hi. This problem still exists with kernel 3.10.0-031000rc1-generic, which I took from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.10-rc1-saucy/ Please let me know if further data is needed and I will do my best to provide it. Thanks in advance, Rogério Brito. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 Zhang Rui changed: What|Removed |Added Status|NEEDINFO|CLOSED Resolution||INSUFFICIENT_DATA --- Comment #18 from Zhang Rui 2012-05-24 07:57:50 --- bug closed as there is no response from the bug reporter. please feel free to reopen it if the problem still exists in the latest upstream kernel. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 Zhang Rui changed: What|Removed |Added CC||rui.zh...@intel.com --- Comment #17 from Zhang Rui 2012-01-18 05:06:39 --- It's great that the kernel bugzilla is back. Can you please verify if the problem still exists in the latest upstream kernel? -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 --- Comment #16 from Rogério Brito 2011-04-29 07:03:32 --- Hi again. (In reply to comment #13) > OK. I can live with that in my boot loader, thank you. Are there any > unintended side-effects? (...) > I will just test the kernel parameter and post back what I find, so > that you can be informed. Just keeping up with my promise, I have tested this, and I think that it works perfectly well. Actually, perhaps not 100% well, but I have yet to see if that is the parameter or if that is some other instability here, since I observed the following: I booted with processor.ignore_ppc=1, unplugged the power, plugged the power and started compiling a new kernel. Then, I left the computer for some minutes. After I returned it was turned off. That may have been a fluke, though. I will try with one of the stable series kernels and give feedback. Thanks. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 --- Comment #15 from Rogério Brito 2011-04-28 11:42:22 --- Hi, Thomas and others. On Thu, Apr 28, 2011 at 06:57, wrote: >> I'll leave for holidays for 3 weeks. You can workaround the issue with: >> processor.ignore_ppc=1 boot parameter. > > OK. I can live with that in my boot loader, thank you. Are there any > unintended side-effects? Just for the record, passing that option seems to work well so far and I am so happy that after almost 4 years this notebook is now not restricted to being operated as a desktop only. Thank you so very much so far, Rogério Brito. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 --- Comment #14 from Rogério Brito 2011-04-28 09:59:51 --- Created an attachment (id=55782) --> (https://bugzilla.kernel.org/attachment.cgi?id=55782) Tarball with the ACPI tables Here is the tarball with the requested ACPI tables. They apparently didn't come with my e-mail. I hope that everything is right now. Thanks. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742
--- Comment #13 from Rogério Brito 2011-04-28 09:57:30 ---
Hi, Thomas.
On Thu, Apr 28, 2011 at 05:58, Thomas Renninger wrote:
> --- Comment #12 from Thomas Renninger 2011-04-28 08:57:58 ---
> Argh, the _PPC function is in a dynamically loaded SSDT which the older
> acpidump does not dump. Can you either compile and run the latest acpidump:
> ftp://kernel.org/pub/linux/kernel/people/lenb/acpi/utils/pmtools/acpidump
No problems. Sure I can compile from that. Anything that you wish.
> copy away and attach the exported tables from here, please:
> /sys/firmware/acpi/tables/dynamic/*
I am attaching here a (small, 850 bytes) tarball with the tables. Does
that mean that the compilation of acpidump above is unnecessary?
> Do you use the original power adapter/battery?
Everything here is original, stock, except the BIOS that was asked to
be upgraded, of course. But this issue was seen since I first acquired
this notebook.
> There were several reports already where this happens when:
> - some ThinkPads if running on AC with battery unplugged (confirmed by Lenovo
> that this is intended).
> - 60W instead of 90W AC adapter
> and similar...
OK. The notebook here is a Itautec N8320 (actually, a rebranded MSI
PR200). Let me just check the AC adapter specs... OK, I'm back. Here
it says that it generates (output, direct current) 19V with 3.42A,
which would make that 19*3.42 = 64.98 W, or, in market-speak, 65W,
right?
> I'll leave for holidays for 3 weeks. You can workaround the issue with:
> processor.ignore_ppc=1
> boot parameter.
OK. I can live with that in my boot loader, thank you. Are there any
unintended side-effects?
> If I have some time again, I can have another look why the BIOS
> is requesting the limit, ping in 4 weeks or so if things get stuck.
OK, no problems.
> I reduce prio of this. Such _PPC/frequency limit issues mostly boil down to be
> a BIOS issue and the kernel typically behaves correctly.
Thank you very much for the workaround. I'm not really sure if we
should cripple the kernel just because we have some defective BIOS,
unless that can be summarized to a blacklist entry.
OTOH, since you are an expert on ACPI, perhaps the other bug (11717)
would benefit from your knowledge, as I am seeing some really weird
behaviour of this notebook. I even put a video on my homepage showing
how it works:
http://www.ime.usp.br/~rbrito/linux/itautec-n8320-sleep-problems.webm
I will just test the kernel parameter and post back what I find, so
that you can be informed.
Thank you very much for the reply, Thomas.
--
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[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 Thomas Renninger changed: What|Removed |Added Priority|P1 |P5 Severity|normal |low --- Comment #12 from Thomas Renninger 2011-04-28 08:57:58 --- Argh, the _PPC function is in a dynamically loaded SSDT which the older acpidump does not dump. Can you either compile and run the latest acpidump: ftp://kernel.org/pub/linux/kernel/people/lenb/acpi/utils/pmtools/acpidump or copy away and attach the exported tables from here, please: /sys/firmware/acpi/tables/dynamic/* Do you use the original power adapter/battery? There were several reports already where this happens when: - some ThinkPads if running on AC with battery unplugged (confirmed by Lenovo that this is intended). - 60W instead of 90W AC adapter and similar... I'll leave for holidays for 3 weeks. You can workaround the issue with: processor.ignore_ppc=1 boot parameter. If I have some time again, I can have another look why the BIOS is requesting the limit, ping in 4 weeks or so if things get stuck. I reduce prio of this. Such _PPC/frequency limit issues mostly boil down to be a BIOS issue and the kernel typically behaves correctly. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 --- Comment #11 from Rogério Brito 2011-04-28 05:54:35 --- Hi. I said this in bug 11717, but that's valid here as well: > Oh, BTW, I still have this Windows Vista partition here (which I want to get > rid of, since it is mostly useless to me, as I have not used DOS/Windows in > the last 17 years and I don't see any value in that, aside of > reverse-engineering it to make Linux work out of the box). > What all this means is that I am willing to install some > development/debugging tools under Windows so that I can provide dumps, logs, > etc. to get the Linux kernel to work even with quiky hardware (which is, > unfortuately, not unheard of). > Unfortunately, Intel's http://biosbits.org/ (which, among other things, > claims to be able to set the BIOS parameters to sane defaults before booting > a kernel) says that my Core 2 Duo system is "unknown", which means that we > have one fewer tool at our disposal. > Do you happen to have any contacts with (or are one of the) people from that > project? I am willing to run many experiments here to get things straight on > this system. > Please, note how many times I have used something like "I am willing to" in > the paragraphs above. I hope that his helps in fixing (or, at least, working around) this bug. Thanks, Rogério Brito. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 --- Comment #10 from Rogério Brito 2011-04-28 05:43:39 --- Hi, just a reminder, I am ready to test things here, and am willing to play the guinea pig role. :-) Thanks in advance, Rogério Brito. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 Rogério Brito changed: What|Removed |Added CC||rbr...@ime.usp.br -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- Fulfilling the Lean Software Promise Lean software platforms are now widely adopted and the benefits have been demonstrated beyond question. Learn why your peers are replacing JEE containers with lightweight application servers - and what you can gain from the move. http://p.sf.net/sfu/vmware-sfemails ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 --- Comment #9 from Rogério Brito 2011-04-22 09:27:16 --- Created an attachment (id=54992) --> (https://bugzilla.kernel.org/attachment.cgi?id=54992) Compressed dmesg after replugging the AC adapter It seems that the interesting stuff happens at around 160s, especially at 163.75s or so, but you people surely know better than I do what are the crucial points. Thanks. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- Fulfilling the Lean Software Promise Lean software platforms are now widely adopted and the benefits have been demonstrated beyond question. Learn why your peers are replacing JEE containers with lightweight application servers - and what you can gain from the move. http://p.sf.net/sfu/vmware-sfemails ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 --- Comment #8 from Rogério Brito 2011-04-22 09:25:23 --- Created an attachment (id=54982) --> (https://bugzilla.kernel.org/attachment.cgi?id=54982) Compressed dmesg from before unplugging the AC adapter -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- Fulfilling the Lean Software Promise Lean software platforms are now widely adopted and the benefits have been demonstrated beyond question. Learn why your peers are replacing JEE containers with lightweight application servers - and what you can gain from the move. http://p.sf.net/sfu/vmware-sfemails ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 --- Comment #7 from Rogério Brito 2011-04-22 09:20:24 --- Created an attachment (id=54972) --> (https://bugzilla.kernel.org/attachment.cgi?id=54972) Output from acpidump Please, note that there was an error (warning?) message sent to stderr saying that there was a checksum mismatch in one of the sections. I included it in the file, but I don't know if you just wanted the "pristine" acpidump or not. I am trying to err on the side of excess here. Thanks. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- Fulfilling the Lean Software Promise Lean software platforms are now widely adopted and the benefits have been demonstrated beyond question. Learn why your peers are replacing JEE containers with lightweight application servers - and what you can gain from the move. http://p.sf.net/sfu/vmware-sfemails ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 Thomas Renninger changed: What|Removed |Added CC||tr...@suse.de Component|cpufreq |BIOS AssignedTo|cpuf...@vger.kernel.org |acpi_b...@kernel-bugs.osdl. ||org Product|Power Management|ACPI --- Comment #5 from Thomas Renninger 2011-04-21 10:13:12 --- > and the problems that I am seeing date back from at least version 2.6.24, from > what I can remember. Most likely a BIOS, _PPC issue, yes it is: before: /sys/devices/system/cpu/cpu0/cpufreq/bios_limit:2001000 after: /sys/devices/system/cpu/cpu0/cpufreq/bios_limit:80 That means _PPC does not return 0 anymore and BIOS tells the OS to limit the frequency. This is an ACPI problem, cpufreq subsystem bevhaves fine (at least this was always the case with similar bug reports recently). -> Re-assign to ACPI component. > Please attach dmesg output including an AC unplug/replug cycle. Best boot with log_buf_len=16777216 before you do the unplug/replug cycle copy this into a file, make it executable and follow instructions: == #!/bin/bash echo 0x >/sys/module/acpi/parameters/debug_layer echo 0xF >/sys/module/acpi/parameters/debug_level echo 7 >/sys/module/cpufreq/parameters/debug logger "Before unplug" echo "It's time to unplug ..." sleep 5 logger "AC got unplugged" echo "It's time to re-plug" sleep 5 echo 0x0 >/sys/module/acpi/parameters/debug_layer echo 0 >/sys/module/cpufreq/parameters/debug == and then attach whole dmesg and also acpidump output. Hm, before you should check for a BIOS upgrade and whether you find related BIOS settings. --- Comment #6 from Rogério Brito 2011-04-22 09:17:19 --- Hi, Rafael, Thomas. Thank you for your answers. Here comes my follow up. (In reply to comment #5) > That means _PPC does not return 0 anymore and BIOS tells the OS to limit the > frequency. This is an ACPI problem, cpufreq subsystem bevhaves fine (at least > this was always the case with similar bug reports recently). > -> Re-assign to ACPI component. OK, sorry for assigning that to the wrong component. It is not always obvious where to file some bugs. > > Please attach dmesg output including an AC unplug/replug cycle. > Best boot with log_buf_len=16777216 > before you do the unplug/replug cycle copy this into a file, make it > executable > and follow instructions: > == > #!/bin/bash > > echo 0x >/sys/module/acpi/parameters/debug_layer > echo 0xF >/sys/module/acpi/parameters/debug_level > echo 7 >/sys/module/cpufreq/parameters/debug > logger "Before unplug" > echo "It's time to unplug ..." > sleep 5 > logger "AC got unplugged" > echo "It's time to re-plug" > sleep 5 > echo 0x0 >/sys/module/acpi/parameters/debug_layer > echo 0 >/sys/module/cpufreq/parameters/debug > == OK. I did all that. As the logs are very big, I am including them compressed here. Please let me know if that's not what you want. > Hm, before you should check for a BIOS upgrade and whether you find related > BIOS settings. Unfortunately, I first tried to find the most recent BIOS update from the manufacturer (it's dated from 2010, IIRC) and, then, after flashing and noticing that it wasn't working, I filed the bug. I don't quite expect any updated version of the BIOS from MSI. Would there be any way to circumvent the buggy BIOS? If not in a clean and generic way, perhaps passing the kernel any extra option? Thanks, Rogério Brito. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- Fulfilling the Lean Software Promise Lean software platforms are now widely adopted and the benefits have been demonstrated beyond question. Learn why your peers are replacing JEE containers with lightweight application servers - and what you can gain from the move. http://p.sf.net/sfu/vmware-sfemails ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
[Bug 33742] Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect
https://bugzilla.kernel.org/show_bug.cgi?id=33742 Thomas Renninger changed: What|Removed |Added CC||tr...@suse.de Component|cpufreq |BIOS AssignedTo|cpuf...@vger.kernel.org |acpi_b...@kernel-bugs.osdl. ||org Product|Power Management|ACPI --- Comment #5 from Thomas Renninger 2011-04-21 10:13:12 --- > and the problems that I am seeing date back from at least version 2.6.24, from > what I can remember. Most likely a BIOS, _PPC issue, yes it is: before: /sys/devices/system/cpu/cpu0/cpufreq/bios_limit:2001000 after: /sys/devices/system/cpu/cpu0/cpufreq/bios_limit:80 That means _PPC does not return 0 anymore and BIOS tells the OS to limit the frequency. This is an ACPI problem, cpufreq subsystem bevhaves fine (at least this was always the case with similar bug reports recently). -> Re-assign to ACPI component. > Please attach dmesg output including an AC unplug/replug cycle. Best boot with log_buf_len=16777216 before you do the unplug/replug cycle copy this into a file, make it executable and follow instructions: == #!/bin/bash echo 0x >/sys/module/acpi/parameters/debug_layer echo 0xF >/sys/module/acpi/parameters/debug_level echo 7 >/sys/module/cpufreq/parameters/debug logger "Before unplug" echo "It's time to unplug ..." sleep 5 logger "AC got unplugged" echo "It's time to re-plug" sleep 5 echo 0x0 >/sys/module/acpi/parameters/debug_layer echo 0 >/sys/module/cpufreq/parameters/debug == and then attach whole dmesg and also acpidump output. Hm, before you should check for a BIOS upgrade and whether you find related BIOS settings. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are watching the assignee of the bug. -- Benefiting from Server Virtualization: Beyond Initial Workload Consolidation -- Increasing the use of server virtualization is a top priority.Virtualization can reduce costs, simplify management, and improve application availability and disaster protection. Learn more about boosting the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev ___ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
