Hi Oliver, first of all: thank you and the team for your brilliant contribution to the Linux kernel. I have been playing with your cdc-ether patch for autosuspend. This is mostly working however I have experienced some issues especially when autosuspend is enabled before the cdc-ether virtual cable is connected. In that case, the host usually fails to get an IP address from the DHCP server. Sometimes it works, most of the times it doesn't. I have not yet managed to understand what makes it fail/succeed. I collected wireshark logs a few of the failing cases and it turns out that the host does not send any DHCP_Discovery packets over the cdc-ether interface. There are no obvious errors in the kernel logs. Am I using your patch beyond its intended use, or doing anything wrong? Thanks, Greg. -----Original Message----- From: Nicolas Chevillot Sent: 09 September 2009 15:05 To: Oliver Neukum; Greg Heinrich Cc: David Brownell; linux-usb@xxxxxxxxxxxxxxx; Carl Nordbeck Subject: RE: [rft]aggressive autosuspend for cdc-ether Oliver, I would like to introduce you Greg Heinrich colleague that is working on CDC-ECM selective suspend at the moment. He found several issues with the patch you provided and would like to get in touch with you in order to have a stable selective suspend on ECM. Regards, Nicolas. -----Original Message----- From: Oliver Neukum [mailto:oliver@xxxxxxxxxx] Sent: 11 August 2009 15:35 To: Nicolas Chevillot Cc: David Brownell; linux-usb@xxxxxxxxxxxxxxx; Carl Nordbeck Subject: Re: [rft]aggressive autosuspend for cdc-ether Am Dienstag, 11. August 2009 14:01:39 schrieb Nicolas Chevillot: > Oliver, > > Which version of the kernel do you want to me to test it on ? 2.6.30 or newer > I will try host suspend/hibernate tests. Thank you > As for device parameters, It might be difficult but I can try. You should be able to forcibly change IP on a device. This need not work, but you should see a resumption event. Regards Oliver -- ****************************************************************************************** This e-mail (including any attachments) is intended only for the recipient(s) named above. It may contain confidential or privileged information and should not be read, copied or otherwise used by any other person. If you are not a named recipient, please contact the sender by telephone (+44-1454-284800) and destroy the original message. Any statement and/or opinion not related to this company's business and expressed in this message is that of the author and does not necessarily reflect those of Icera. This company does not take any responsibility for the views of the author in any matter not related to the company's objective. ****************************************************************************************** -- 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
