| Summary: | cpupower frequency is always at minimum (range is from "minimum" to "minimum") | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Dr. Tilmann Bubeck <tilmann> |
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
| Status: | CLOSED NOTABUG | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 16 | CC: | gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, psabata |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-11-08 06:37:11 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
This bug should go to package kernel-tools, which is not available in bugzilla. I'd say your BIOS limits the maximum clock speed to 800MHz when running on battery (that's quite common). See the 'current policy' line in the cpupower output you posted. Could you check if this also happens when running with AC supply connected? If it doesn't see, your BIOS settings. The OS can't do more in that case. Oh, and kernel-tools is a kernel subpackage. The component should be 'kernel'. Re-assigning. The problem happens also with AC connected (in fact it already was connected when I posted the bug report and generated the output from cpupower). However, it does not happen if I start FC14. My machine is dual boot, so I could always decide for FC14 or FC16. It only happens in FC16. So I do not assume a BIOS setting. In fact I do not see any BIOS setting for this. Is the cpupower service running? If so, it should have set the governor to performance, not ondemand. Can you provide the output of acpidump and dmesg? The laptop had a problem with cooling. After I replaced it (with the exact same model and bios version and settings), then problem went away. Sorry for bothering you. |
Description of problem: After booting the CPU is very slow. cpupower shows that the frequency is always 800 MHz even if 1.87 GHz are allowed: [root@t43 bubeck]# cpupower frequency-info analyzing CPU 0: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 20.0 us. hardware limits: 800 MHz - 1.87 GHz available frequency steps: 1.87 GHz, 1.60 GHz, 1.33 GHz, 1.07 GHz, 800 MHz available cpufreq governors: conservative, userspace, powersave, ondemand, performance current policy: frequency should be within 800 MHz and 800 MHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 800 MHz (asserted by call to hardware). boost state support: Supported: no Active: no [root@t43 bubeck]# /proc/cpuinfo also always shows 800 MHz regardless of heavy load. Version-Release number of selected component (if applicable): kernel-tools-3.1.0-0.rc8.git0.0.fc16.i686 kernel-3.1.0-0.rc8.git0.0.fc16.i686.PAE IBM Thinkpad T43 with a Intel(R) Pentium(R) M processor 1.86GHz. How reproducible: always Steps to Reproduce: 1. Boot Fedora 16 2. check cpu frequency 3. Actual results: 800 MHz Expected results: 1.87 GHz Additional info: