[argyllcms] Re: wakeups patch to libusb-0.1.12 causes Eye-One Pro failure on Linux
- From: "Frederic Crozat" <fred@xxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 26 Feb 2008 14:01:51 +0100
On Tue, Feb 26, 2008 at 1:25 PM, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote:
>
> After some discussions on the libusb list, and some testing on
> my Fedora 8 test system, I can confirm that the wakeups
> patch being applied to some Linux distributions version
> of libusb-0.1.12 (ie. Fedora libusb-0.1.12-wakeups.patch)
> breaks operation of the Eye-One Pro instrument.
>
> This is because the patch breaks the ability to acess
> two endpoints from two different threads. (Note that
> this patch is a CPU usage optimization rather than
> a functional bug fix.)
Already noted on Mandriva cooker one month ago. I've disabled this patch.
> My advice is that Argyll should not be linked
> with a system supplied libusb-0.1.12 with
> libusb-0.1.12-wakeups.patch, but that the version
> of libusb included in the Argyll sources (and which
> have been tested against all the supported instruments)
> be used until such time as such patches are removed
> or corrected.
I've also been forced to drop your own patch on libusb since it breaks
other devices (this has been posted on libusb-devel ml and you're
probably already aware of the issue).
--
Frederic Crozat
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