http://bugzilla.kernel.org/show_bug.cgi?id=3927
------- Additional Comments From [EMAIL PROTECTED] 2006-03-02 00:18 ------- This bug looks to be related to http://bugme.osdl.org/show_bug.cgi?id=5573 . It has also generated a Ubunto HowTo: http://ubuntuforums.org/showthread.php?s=bb5681d829b8bfd25862caab2a63db20&t=75281 I observe this bug on my HP Pavilion a1250n. It has a dual core Athlon 64 3800+ x2 and uses the ATI Radeon Xpress 200 chipset (RS482 nothbridge, SB400 southbridge). It is running Fedora Core 4's kernel-smp-2.6.15-1.1831_FC4 for x86-64 (no, not a kernel.org kernel). I tried the following things to make the clock behave: 1. in BIOS config, tried to disable "spread spectrum" as per #41 in Ubunto HowTo. There was no such setting to change. 2. updated to HP BIOS 3.40 [no change] 3. booted with notsc [no change] 4. booted with acpi_skip_timer_override [no change] 5. booted with disable_timer_pin_1 [worked!] Even though the clock problem is gone, there are a couple of symptoms that suggest related APIC or interrupt routing problems to me. After 30 hours of uptime (assuming the clock isn't lying) - I see 29 errors like this: APIC error on CPU0: 40(40) All are detected on CPU0 for some reason. The first such error, and only the first, is slightly different: APIC error on CPU0: 00(40) Googling shows that this APIC error shows in dmesg output on systems with the RS480 or RS482. - /proc/interrupts shows a lot of parport0 interrupts, even though there is nothing connected to the parallel port: 7: 374934 26822359 IO-APIC-edge parport0 - /proc/interrupts shows a lot of USB interrupts. The only thing connected to a USB port is the built-in flash card reader (without any cards loaded): 225: 8589443 0 IO-APIC-level ehci_hcd:usb1, ohci_hcd:usb2, ohci_hcd:usb3 - the total number of interrupts fielded by each CPU is extremely close, and I see no reason for this to be the case. Could the parport0 interrupts be invented somehow to balance the two cpu's??? Notice that the number of CPU1 timer interrups equals the number of CPU0 parport0 interrupts? And that the reverse is close to true? CPU0 CPU1 0: 26822411 374934 IO-APIC-edge timer 1: 20918 0 IO-APIC-edge i8042 7: 374934 26822359 IO-APIC-edge parport0 8: 0 0 IO-APIC-edge rtc 12: 359851 0 IO-APIC-edge i8042 14: 1948929 0 IO-APIC-edge ide0 169: 2 0 IO-APIC-level acpi, ohci1394 201: 114362 0 IO-APIC-level libata 209: 159867 0 IO-APIC-level eth0 217: 1 0 IO-APIC-level ATI IXP 225: 8589443 0 IO-APIC-level ehci_hcd:usb1, ohci_hcd:usb2, ohci_hcd:usb3 NMI: 1877 1118 LOC: 27198396 27198373 ERR: 29 MIS: 0 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
