Bug#704242: Driver for PL-2303 HX not working
On Tue, Jan 14, 2014 at 12:01:30AM +0100, Karsten Malcher wrote:
> Hello together,
>
> i will close this bug at Debian now.
>
> After the last update this error seems to disappear in Debian stable.
> http://ftp.debian.org/debian/dists/wheezy/ChangeLog
> USB: pl2303: fix device initialisation at open
That's good to hear.
> The source for this patch can be found here:
> http://www.spinics.net/lists/stable/msg30311.html
This is not directly related to commit you refer to above (it fixes a
different problem).
> It's possible that this will not fix the bug under all circumstances
> depending on the application.
>
> Summary: ======
>
> I did need some time to realize that this bug will occur only with
> PL2303HX chips that are China clones. In fact this type of chips run
> out of production at Profilic.
> http://www.prolific.com.tw/US/ShowProduct.aspx?pcid=41&showlevel=0017-0037-0041
> Only the PL2303HXD can be buyed as original, so any new PL2303HX is a
> China clone.
>
> I have been contacted by Frank Schäfer and so we tested some of his
> driver improvements in combination with newer kernels. Up to now this
> could not be backported to kernel 3.2.x, but i could test a kernel
> 3.12.6 on Debian wheezy and the PL2303HX is running fine.
>
> There are really much products with this clone chips out there, so
> some further improvements of the driver would be really helpful. I
> will make further tests together with Frank and hope that this
> improvements will find a place into the next kernel versions starting
> with Debian jessie and 3.12.6
The pl2303 has been cleaned up quite a bit lately (will show up in
v3.14), so it should be even easier to add support for further device
types with all their quirks. Patches are most welcome.
Thanks,
Johan
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