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Hello everyone,

RHEL6 and CentOS6 systems still use an old version of udev (147). It
wasn't until udev 148 (Yep. 1 version off!) that the input class system
changed from "ID_CLASS" to "ID_INPUT_{JOYSTICK,KEYBOARD,MOUSE,etc}"
(http://lwn.net/Articles/364728/). Because SDL2 looks for the ID_INPUT_X
field this means that it never detects any input devices on RHEL6
systems.

I've attached a patch which fixes the problem. If no input devices are
detected with "ID_INPUT_X" then SDL will fallback to looking for the old
style "ID_CLASS" udev field instead.
Because of the "big change" between udev versions I doubt it'll ever get
upgraded on RHEL6, but because RHEL7 is on the way I don't know if this
patch is worth merging. Hopefully it'll help anyone out that's having
this problem though.

Ashley

P.S. I was going to submit this to the bugzilla but I haven't received
any emails from it to create an account.
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Grr, the thing that sends bugzilla mail keeps crashing or something.
Just kicked it again, you should get mail soon. Sorry!

--ryan.



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On 2014-03-28 02:54, Ryan C. Gordon wrote:

Thanks. That's worked. I've resubmitted to bugzilla:
https://bugzilla.libsdl.org/show_bug.cgi?id=2477

Ashley
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