Re: wacom module bug? "unable to handle kernel paging request..."

Hello Magnus,
I will try wacomproxy. Thanks!
Nicolas

Magnus Vigerlöf wrote:
> On måndag 23 juli 2007, Nicolás Carranza wrote:
>   
>> Hello,
>> Sometimes after unplugin/plugin my usb wacom tablet, it stops working
>> and I get this in my /var/log/messages:
>> -----
>>     
> [kernel oops snip]
>   
>> -----
>>
>> What is wrong?
>>     
>
> This is a problem in the input subsystem in the linux kernel. There are some 
> locks that are not present that causes this in some cases when you disconnect 
> the tablet (I get it on and off both when unplugging and suspending the 
> laptop). I've had a look at it but not seen an easy way to add them though..
>
> The only fix after one of these is a reboot (you might need to yank the power 
> coord, at least I had to as my distro hung during shutdown). The whole 
> USB-subsystem goes by the way...
>
> But the good side is that there are workaround for this. I'm not sure the 
> user-space proxy device [linuxwacom-devel, Nov-06 'alternative way to support 
> tablet hotplugging'] will help you here. It might be a small timing issue, 
> and the user-space program might add sufficient delays that it won't make 
> this happened.
>
> If that doesn't help, have a look at the wacomproxy (also a SF-project) 
> kernel 
> module that I guaratee does not have the kernel-oops problem (one of the two 
> reasons it was written).
>
> Cheers
>  Magnus
>
>   


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