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3.276 bytes |
Service Hints & Tips |
Document ID: LWIK-3XFR25 |
TP General - CPU speed decreases when in battery mode
Applicable to: World-Wide
SYMPTOM:
The processor of your ThinkPad seems to be running very slow when running on battery power. In benchmarks, the CPU is reported to be 3x slower than it should be (E.g. 50Mhz instead of 150MHz).
CONFIGURATION:
Any ThinkPad with APM, running on battery power.
SOLUTION:
Power Management on ThinkPads allows one to specify what performance they require when running on battery power. The active settings need to be a balance between battery life and performance. One of the options in Advanced Power Management is to run the CPU in 'Slow', 'Medium' or 'Max' mode. Selecting either of the first two will slow down the CPU in battery mode.
To change the settings, go to Start ==> Programs ==> ThinkPad ==> ThinkPad Configuration / ThinkPad Features. Click on the battery icon, then on the Power Mode tab. Ensure that the Power Source is set to battery, that the Customized radio button is selected, and that the Processor Speed is set to Maximum.
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Hint Category |
General Information | |
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Date Created |
17-08-98 | |
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Last Updated |
26-01-99 | |
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Revision Date |
26-01-2000 | |
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Brand |
IBM ThinkPad | |
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Product Family |
ThinkPad 310, ThinkPad 315, ThinkPad 365X/XD, ThinkPad 380, ThinkPad 380D, ThinkPad 380E, ThinkPad 380ED, ThinkPad 380XD, ThinkPad 380Z, ThinkPad 385D, ThinkPad 385E, ThinkPad 385ED, ThinkPad 385XD, ThinkPad 560, ThinkPad 560E, ThinkPad 560X, ThinkPad 560Z, ThinkPad 600, ThinkPad 600E, ThinkPad 755C/CS, ThinkPad 755CE/CSE, ThinkPad 755CX, ThinkPad 755CV, ThinkPad 755CD, ThinkPad 755CDV, ThinkPad 760C, ThinkPad 760E, ThinkPad 760CD, ThinkPad 760L/LD, ThinkPad 760ED, ThinkPad 760XD, ThinkPad 760EL/ELD, ThinkPad 760XL, ThinkPad 765L, ThinkPad 765D, ThinkPad 770, ThinkPad 770E/ED, ThinkPad 770X, ThinkPad 770Z, ThinkPad i Series 1400, ThinkPad i Series 172x | |
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Machine Type |
2600, 2625, 2635, 2636, 2640, 2641, 2645, 2646, 9545, 9546, 9547, 9548, 9549, 9544, 2611, 2627 | |
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Model |
Various | |
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