Question about IBM ThinkPad R31 2656 Notebook

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Volume&thinkpad button I was wondering if anyone knew how to get these buttons to work, I have an IBM Thinkpad R31. any help would be great, Thanks

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I'm looking for a FREE manual download which shows what ALL the buttons do on my keyboard. Any suggestions? Thanx, peace...

Posted on Nov 06, 2008

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Most IBM / Lenovo Thinkpads have hardware volume control with apropriate buttons above the keyboard (volume up, down and mute). Gnome in Ubuntu is configured in such a way, that the keypresses are trapped (this is correct), apropriate volume window is displayed (correct) and Gnome volume control is modified. Last step is actually wrong - the keys in Thinkpads control the volume hardware directly, so every keypress turns the volume up/down regardless of sound card settings (in Ubuntu case - this would be Alsa mixer). Current behaviour results in volume being changed twice - for example if I press the volume up button, I get volume reduction via Gnome sound mixer plus volume reduction via hardware control. Effectively this creates an exponential (and not linear as it should be) volume change. In short - it is very difficult to control volume, especially relatively quiet sounds, with volume keys only.
The "patch" solution is to decouple Gnome mixer from hardware buttons. Of course it could be done manually, by deleting apropriate key actions in System->Preferences->Keyboard shortcuts, but this also disables windows showing volume. A better thing (but more complex) would involve reading /proc/acpi/ibm/volume and displaying the volume window according to this value at each volume button keypress.
I tested this on T21, T42 and Thinkpad 600. I guess only some R series notebooks (R31 etc.) would not be affected, as these do not have hardware mixer.
Steps to reproduce:
1. Press hardware volume key (eg. volume up) on a Thinkpad
2. Observe the volume change - it is changed in hardware mixer (correct) and in Gnome volume control (incorrect)

I hope this helps...

Posted on Apr 18, 2008

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SOURCE: buttons?

u can load the driver of that button. i have a same laptop i load the driver then it work

Posted on Apr 26, 2008

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