Messages in this thread | | | Date | Thu, 24 May 2012 14:31:16 +0200 | From | Andreas Herrmann <> | Subject | Re: PROBLEM: Performance drop |
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On Thu, May 24, 2012 at 02:12:39AM +0700, Comrade DOS wrote: > PROBLEM: Performance drop > > After the release of linux 3.4.0 I've updated the kernel on all my machines. > In most of the computer upgrade was successful. > However, on my old laptop (HP Compaq 6715b) after the upgrade was just > impossible to work. > I found that CPU frequency scaling no longer work properly on this machine. > After loading the CPU clock is reset to the minimum (800 MHz), and > remains so until you reboot. > Changing the type of governor is not helping. > Recompile the kernel without CPU frequency scaling has been to solve > the problem, but even after this performance leaves much to be desired > (although, according to /proc/cpuinfo CPU frequency set maximum). > In addition to the above-described problems, there is another - the > problem with rebooting and shutting down (and possibly also have a > problem with s2ram and/or s2disk, but I'm their functionality I have > not tested). > If you try to shut down or restart the laptop it hangs.
This somehow reminds me of commit 26adcfbf00e0726b4469070aa2f530dcf963f484 (x86: SB600: skip ACPI IRQ0 override if it is not routed to INT2 of IOAPIC).
See also https://bugzilla.kernel.org/show_bug.cgi?id=11715 and https://bugzilla.kernel.org/show_bug.cgi?id=11516
Question is why the quirk doesn't work (anymore) on your system.
What was the kernel release used before 3.4.0 was install on your Laptop?
Please provide dmesg with apic=debug kernel option when kernel 3.4 is booted?
Can you please try to boot with kernel paramter acpi_use_timer_override in another test run and with acpi_skip_timer_override in a 3rd test (and also using acpi=debug in both cases) and provide dmesg output for those testruns.
Thanks,
Andreas
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