Bug 90593
| Summary: | IBM ThinkPad T40 Pentium-M Always Minimum MHz | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | ammulder |
| Component: | kernel | Assignee: | Arjan van de Ven <arjanv> |
| Status: | CLOSED WONTFIX | QA Contact: | Brian Brock <bbrock> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 9 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2003-05-19 00:26:58 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: | |||
Without information on Intel on the Pentium-M frequency scaling, this won't work under Linux. Basically, it will be stuck at whatever speed it booted at (600Mhz for battery, full speed for AC.) |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20030225 Description of problem: I just laid hands on a new IBM ThinkPad T40. It is a Pentium-M model. In the BIOS, I set the power saving mode on the CPU to "automatic", which is supposed to turn the MHz up when necessary and down when not. In Windows, it lives at ~600 MHz normally, and if I start a compile, jumps to 1600 MHz immediately and is extremely responsive, and returns to ~600 MHz when compile completes. In Red Hat Linux 9, it lives at 600MHz always, judging by /proc/cpuinfo. If I start the same compile, the mouse and keyboard become extremely unresponsive (10-30secs between events), and /proc/cpuinfo still shows ~600MHz. If I go into the BIOS and set the CPU power saving to "optimal performance", it runs at 1600MHz always (again, judging by responsiveness and /proc/cpuinfo), but the battery life is significantly shorter (30%+). Version-Release number of selected component (if applicable): kernel-2.4.20-9 apmd-3.0.2-18 How reproducible: Always Steps to Reproduce: 1. In BIOS, set CPU power saving to "automatic" 2. Boot into Red Hat 9 3. Run a large compile Actual Results: mouse and keyboard are extremely unresponsive, /proc/cpuinfo shows ~600 MHz Expected Results: UI responsive, /proc/cpuinfo shows ~1600MHz during compile, returning to ~600 Mz afterward Additional info: