[ Please try to avoid top-posting. ] On Tue, Jul 07, 2015 at 01:26:33PM +0300, Evgen Druzhynin wrote: > Sorry for misunderstanding, I've tested the behavior of Arduino board > on 2 machines and the result is following: > > PASSED - Arduino board was connected successfully > FAILED - ch341 errors arose > > 1st machine [USB 3.0] -- Linux 3.18 -- PASSED > 1st machine [USB 3.0] -- Linux 4.* -- FAILED > > 2nd machine [USB 2.0] -- Linux 3.18 -- PASSED > 2nd machine [USB 2.0] -- Linux 4.0 -- PASSED > > Therefore Jonah Hovold was right and root cause was underlying xhci driver. Ok, so it looks like a regression between 3.18 and 4.0. Could you try v3.19 and then run a bisect on either v3.18..v3.19 or v3.19..v4.0 depending on the result? Please verify that v3.18 works and v4.0 fails. Specifically, do not use stable releases when testing because the offending change could already have been backported. Thanks, Johan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
