Symptoms are high temperature when high usage of CPU, with reboot when more than 100°C (information extract from ACPITZ/1 entry). I found a bug entry in launchpad about wrong fan speed but even if I force the fan to max (see the bug description of the launchpad entry) the computer is still rebooting after one minute of high CPU usage.
But I'm starting to suspect several bugs in my case. My battery has a lifetime of 2 to 3 hours, half of what I had before ubuntu 11.10 (~5 hours). So it maybe related to ASPM bug, but even with recent updates of the kernel I have still the problem. I've tried multiple kernel startup switchs fixup found with ubuntu 11.10 but nothing really changed. Abot ASPM, dmesg returns:
$ dmesg | grep ASPM
[ 0.160288] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
Maybe I need to try again with 12.04 ?
Two last things: - I cannot open my computer to remove possible dust (computer owned by my company, guaranty yada yada...) - I saw somewhere possible GPU overheating (cannot found the link), anyone has such experience ?
Any hint, clue or proposal welcomes...
update 1
I've also run 'powertop' and saw several other things:
First, Turbo mode of the processor is always running 25% of the time:
Package | CPU 0
Turbo Mode 24.4% | Turbo Mode 21.7%
2.81 Ghz 1.8% | 2.81 Ghz 1.6%
2.14 Ghz 0.9% | 2.14 Ghz 0.9%
1.60 Ghz 3.3% | 1.60 Ghz 3.3%
800 Mhz 57.5% | 800 Mhz 55.2%
Idle 12.1% | Idle 17.4%
| CPU 1
| Turbo Mode 24.1%
| 2.81 Ghz 1.8%
| 2.14 Ghz 0.9%
| 1.60 Ghz 3.2%
| 800 Mhz 54.5%
| Idle 15.5%
Second, Tunables tab prints a lot of devices with important runtime (no economy energy mode ?):
Bad Enable SATA link power management for /dev/sda
Bad NMI watchdog should be turned off
Bad Power Aware CPU scheduler
Bad VM writeback timeout
Bad Enable Audio codec power management
Bad Autosuspend for USB device Fingerprint Sensor [4-1]
Bad Autosuspend for USB device USB Receiver (Logitech)
Bad Autosuspend for USB device Android Phone (HTC)
Bad Runtime PM for PCI Device Intel Corporation Mobile 4 Series Chipset Memory Controller Hub
Bad Runtime PM for PCI Device Ricoh Co Ltd R5C832 IEEE 1394 Controller
Bad Runtime PM for PCI Device Intel Corporation Mobile 4 Series Chipset MEI Controller
Bad Runtime PM for PCI Device Intel Corporation 82567LF Gigabit Network Connection
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) HD Audio Controller
Bad Runtime PM for PCI Device Ricoh Co Ltd xD-Picture Card Controller
Bad Runtime PM for PCI Device Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter
Bad Runtime PM for PCI Device Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter
Bad Runtime PM for PCI Device Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller
Bad Runtime PM for PCI Device Intel Corporation Ultimate N WiFi Link 5300
Bad Runtime PM for PCI Device Ricoh Co Ltd RL5c476 II
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) PCI Express Port 4
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) PCI Express Port 5
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) PCI Express Port 2
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) PCI Express Port 3
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3
Bad Runtime PM for PCI Device Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode]
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5
Bad Runtime PM for PCI Device Intel Corporation 82801I (ICH9 Family) PCI Express Port 1
Third, About "Power Aware CPU scheduler", changing cpu policy to powersave does not solve the problem.
update 2
Using switch 'acpi_osi=Linux' (as described here) does not fix the problem.
update 3
Seems this is not a problem with ASPM, as my computer does not seem to support it. If I had pcie_aspm=force
to kernel, I've the following output:
$ dmesg | grep ASPM
[ 0.000000] PCIe ASPM is forcibly enabled
[ 0.197865] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it