Bug 218542
| Summary: | Frequency scaling support on Athlon (K7) systems doesn't work | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Jarod Wilson <jarod> |
| Component: | cpuspeed | Assignee: | Jarod Wilson <jarod> |
| Status: | CLOSED CANTFIX | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | medium | ||
| Version: | 6 | CC: | mark |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2006-12-06 17:40:12 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 215813 | ||
| Bug Blocks: | |||
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Description
Jarod Wilson
2006-12-05 22:14:39 UTC
Okay, I've talked this over a bit internally... Basically, AMD just didn't get it wrt cpu frequency scaling until the AMD64 line. Only a few Athlon K7 systems, primarily laptops, actually have functional support for cpu frequency scaling. The chip has to properly support it (most mobile athlons do, most desktop athon procs do not), but the motherboard bios must also support it, so putting a mobile chip in a desktop won't necessarily help. If your system does properly support cpu frequency scaling, your dmesg output upon boot should have a message prefixed "powernow-k7: " that gives some indication of this, and /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver *should* be present... If you've got one or the other, there may be something we need to fix, but otherwise, this is a hardware problem that we can't fix. If you could attach dmesg output from just after boot and show the output of 'ls -l /sys/devices/system/cpu/cpu*/cpufreq/', it should tell us whether or not there's anything that can be done here. [root@pacific ~]# dmesg | grep -i k7 [root@pacific ~]# grep -i k7 /var/log/messages [root@pacific ~]# ls /sys/devices/system/cpu/cpu? cache crash_notes topology [root@pacific ~]# So, not supported. And the new cpuspeed package from updates-testing gets rid of the nag message. Okay, closing bug as CANTFIX accordingly, since this is a hardware limitation. |