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Some users have reported that their keyboards work fine on Arch linux, but on Debian<br />
distro's, their keyboards become erratic (repeats and/or skips key presses). One suggested<br />
remedy to this, which has some positive feedback, is to adjust the USB bus speed. To do<br />
this, you need to edit the cmdline.txt file, and add "dwc_otg.speed=1" (without quotes) to<br />
the end of the file (found in the /boot directory).<br />
Worst case scenario, some (advanced) keyboards, such as the Roccat Arvo, have kernel<br />
modules that need activating. If you have access to another keyboard temporarily, you<br />
will need to modprobe the relevent driver. Or if this is not possible, you can rebuild the<br />
kernel (instructions available on the wiki page) with the modules installed. (to find the<br />
drivers for keyboards etc, you need to find "Device Drivers -> hid Devices".)<br />
Keyboard / Mouse interferes with USB WiFi device<br />
Connecting a keyboard and/or mouse while a USB WiFi device is connected, may cause<br />
one or both devices to malfunction. On April 30 2012, there was a bugfix [9] relating to<br />
USB sharing between high-speed (eg. WiFi) and full/low-speed devices (eg. keyboard/<br />
mouse). User spennig [10][11] reports this patch did not fix the Mouse/WiFi conflict. On<br />
2012-05-12, user spennig was pleased to confirm that wifi was working with a USB<br />
keyboard and mouse, as long as the Raspberry Pi had a good PSU and a powered hub.<br />
Even so, some experimentation was needed, e.g. USB WiFi connected to the device, and<br />
the keyboard and mouse connected to the powered hub. Some experimentation may be<br />
necessary to find a working combination; however a good power supply is essential.<br />
Wireless Keyboard trouble<br />
Some wireless keyboards, for example the Microsoft Wireless Keyboard 800 are reported<br />
to fail [12] even though the current drawn by the wireless adaptor is within the R-Pi USB<br />
spec limit of 100 mA. This may be a software driver problem.<br />
Re-mapping the keyboard with Debian Squeeze<br />
If different letters appear on-screen from that which you typed, you need to reconfigure<br />
you keyboard settings. In Debian, from a command line type:<br />
sudo dpkg-reconfigure keyboard-configuration<br />
Follow the prompts. Then restart your RasPi.<br />
Or:<br />
From the command line type:<br />
sudo nano /etc/default/keyboard
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