Difference between revisions of "User:Piccobello/Hissing sound on battery"
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Piccobello (Talk | contribs) (→Sound related to screen brightness) |
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The problem is described [[Problem with high pitch noises|here]]. | The problem is described [[Problem with high pitch noises|here]]. | ||
| − | + | On my {{X31}} I identified two distinct hissing sounds: | |
== Sound related to screen brightness == | == Sound related to screen brightness == | ||
| Line 9: | Line 9: | ||
while on AC power by simply decreasing screen brightness. | while on AC power by simply decreasing screen brightness. | ||
| − | Only | + | Only at full screen brightness the sound would stop. There is a BIOS |
setting that regulates that: simply switching Config>Display>Brightness from | setting that regulates that: simply switching Config>Display>Brightness from | ||
Normal to High solved the problem. | Normal to High solved the problem. | ||
This means that my batteries will last less, but if I'm in a noisy environment I can still decrease brightness manually. | This means that my batteries will last less, but if I'm in a noisy environment I can still decrease brightness manually. | ||
| − | |||
==Sound related to CPU== | ==Sound related to CPU== | ||
Latest revision as of 10:46, 25 November 2006
The problem is described here. On my X31 I identified two distinct hissing sounds:
It took me a while to realize this.. the sound seemed to not depend on CPU in any way: it would always start when I unplugged the power. I then realized that the sound would stop when the screen was off, and that I could start it while on AC power by simply decreasing screen brightness.
Only at full screen brightness the sound would stop. There is a BIOS setting that regulates that: simply switching Config>Display>Brightness from Normal to High solved the problem.
This means that my batteries will last less, but if I'm in a noisy environment I can still decrease brightness manually.
I noticed another much weaker sound that seems to be turned on whenever I switch to the performance governor, and is only turned off if I switch to powersave, regardless of wether the battery is used. This does not affect me as I never use the performance governor.
