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Groups > linux.debian.kernel > #60174
| From | Greg KH <gregkh@linuxfoundation.org> |
|---|---|
| Newsgroups | linux.debian.bugs.dist, linux.debian.kernel |
| Subject | Bug#889831: USB rndis_host - slow download transfers, RX errors |
| Date | 2018-02-08 16:50 +0100 |
| Message-ID | <vgWCt-5zi-5@gated-at.bofh.it> (permalink) |
| References | <vgB4Z-7H9-3@gated-at.bofh.it> <vgFLk-2sZ-9@gated-at.bofh.it> <vgWCt-5zi-7@gated-at.bofh.it> <vgB4Z-7H9-3@gated-at.bofh.it> <vgWCt-5zi-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Cross-posted to 2 groups.
On Thu, Feb 08, 2018 at 02:16:08PM +0000, Tomasz Janowski, Ph.D. wrote: > Dear USB developers, > > Based on my google research, the problem I experience seems to happen > with some newer smartphones. My test case is Samsung Galaxy S8 (SM-950U1). I am > trying to use USB tethering and everything seems to work as expected (modules > are loaded, Ethernet devices are up and running, dhcp works fine). I can connect to > the external world using both LTE or wireless network on the phone. > > Now, the problem is that the download speeds are terrible, around 64 KB/s, > while uploads are fast, the order of 15 MB/s. These speeds do not depend > on the wireless service provider: the results are similar when I tether wi-fi. > The USB Ethernet interface on the Linux host reports a lot of receive errors (attached: > device_state.txt), while kernel reports bad rndis messages (attached: kernel.log.txt). > > Windows 10 works great with the same hardware (same PC and same phone), with > uploads and downloads in the order of 150 Mbit/s, which is probably as fast as my > wireless network can do. But some people reported issues with older Windows drivers too. > Is possible that some newer version of RNDIS protocol is around and Linux hasn't updated > its RNDIS module yet? Hey, I was _just_ talking to someone at Google about this same issue yesterday, you beat him sending this same type of report to the mailing list, nice job :) Yes, this is not good, and we should work to resolve this, but first, what kernel version are you using? I think some fixes for the rndis driver went in recently to 4.15, but it would be good to verify that this isn't already resolved. thanks, greg k-h
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Bug#889831: linux-image-4.14.0-0.bpo.3-amd64: USB RNDIS ethernet gadget - slow download transfers, RX errors Tomasz Janowski <t.j@duke.edu> - 2018-02-07 17:50 +0100 Bug#889831: linux-image-4.14.0-0.bpo.3-amd64: USB RNDIS ethernet gadget - slow download transfers, RX errors Ben Hutchings <ben@decadent.org.uk> - 2018-02-07 22:50 +0100 Bug#889831: USB rndis_host - slow download transfers, RX errors Greg KH <gregkh@linuxfoundation.org> - 2018-02-08 16:50 +0100 Bug#889831: USB rndis_host - slow download transfers, RX errors Greg KH <gregkh@linuxfoundation.org> - 2018-02-08 17:40 +0100
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