Probably not really needed, but I can confirm this the same problem (upgrade from Kubuntu 10.10 to 11.04, /proc/acpi/thermal_zone is missing, fan spins at high speed, and CPU still gets throttled (/sys/devices/system/cpu0/thermal_throttle/core_throttle_count shows not 0) due to overheating). The fans slows down when I slow down the CPUs by doing a simple
echo 931000 > /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq for all CPUs (I got 8). That means: Fan control works somehow. /proc/acpi/thermal_zone makes it difficult to check the temperature. Seems CPUs are kept busy too much somehow since the upgrade. Hardware: Dell Vostro 3700 (Intel i7, quad core, nVidia video). For all those who don't like noisy notebooks, my workaround (attached) ** Attachment added: "Script to set the CPU to lowest possible frequency, allowing the fans to slow down." https://bugs.launchpad.net/ubuntu/+source/linux/+bug/748574/+attachment/2106068/+files/power-save.sh -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/748574 Title: 11.04 Beta started to stress cpu fan and heating cpu -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
