Re: [Linuxwacom-discuss] Intuos4 and pointer jitter

[Alexia D. <ale...@gm...>]

On Tue, Dec 22, 2009 at 10:31 PM, SHIRAKAWA Akira
<shi...@gm...> wrote:
> On 2009-12-22 20:23, Alexia Death wrote:
>
>> Your result actually proves, that there is nothing wrong with linuxwacom
>> drivers because for virtualbox USB they are bypassed completely and the
>> windows driver handles raw usb data.
> You're right in that the windows usb data is bypassed, but I don't see how
> this alone proves that there's nothing wrong with linuxwacom drivers.
Well, nothing to do with the shaking anyway because the linuxwacom
driver does not touch this data AFAIK.


> If it's not the linuxwacom drivers, it must be something like that, yes.
> Otherwise the difference between Linux and Windows (native or virtualized,
> same results) couldn't be explained.
Your last mail said that windows virual on linux shared the problem, right?

> I don't have an externally powered USB hub, but Wacom tablets have a very
> low energy consumption. I don't think that the amount of power the usb port
> can offer is the problem.
Amount shouldn't be the problem but stability may be.

> I'll try using the 1.1 USB protocol if possible
> and check if the problem can be solved, but if it works it's a very ugly
> workaround (I rely heavily on USB mass storage instead, so I need USB to
> work at full speed).
If it works, complaints/bugs probably need to land on the USB driver.


> I don't know what to think anymore...
> If it's the tablet, why under Windows it works perfectly it's beyond my
> comprehension. I also guess it's not an USB driver issue.
Not under virtual windows in linux tho, right? If it worked there too,
one might suspect that windows driver is doing some smoothing....

I dont know... In electronics, unexplained noise usually starts with a
bad ground connection somewhere... but here...

good luck anyway,
--Alexia