Question about IBM ThinkPad R31 2656 Notebook
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
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
Tips for a great answer:
Jun 30, 2012 | IBM ThinkPad R31 2656 Notebook
Theres no function key lock, just the blue Fn button on the lower left corner of the keyboard.
If you cant get any of the function keys to work and the keyboard just thinks that you are pressing the standard button without pressing Fn, then this could be a fault with the contacts in the Fn key.
You might want to try
To help you troubleshoot your keyboard. I think you need to get a diagnostic utility running to be sure the key is faulty.
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