Re: How to know if USB device has driver properly installed?
On Sat, 13 Mar 2010 00:09:13 +0100
Florian Kulzer <florian.kulzer+debian@icfo.es> wrote:
...
> The kernel seems to use the information in
>
> /lib/modules/$(uname -r)/modules.alias
>
> to decide which module(s) to try for a given device. AFAIK, this
> information is generated/updated by running depmod, which is handled
> automatically if you install a Debian kernel package or if you use
> module-assistant/DKMS to handle additional modules.
...
> That is also how I understand the process. Some of the entries in
> modules.alias are straightforward vendor/device-ID pairs, while others
> use wildcards for these values and rely on capabilities such as "a modem
> of class X, subclass Y that understands protocol Z". The module then
> often uses dedicated diagnostic code to find out if it really supports
> that particular device. Syslog/dmesg should reveal which modules the
> kernel tried in response to a USB hotplug event and if there were any
> problems. Modprobing the module with a higher debug level (if that
> option is available) should provide additional clues.
This looks like useful stuff to know - thanks.
Celejar
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