Using ubuntu 17.10, kernel 4.13-0.15-generic on XPS 13 9360 QCA6174 rev 32. Connection on 5Ghz band AC Freebox router.
Had the same problem, however browser speedtest [1] worked fine, except that any upload on nfs or cifs were from 0 to max 1MB/s with system freeze when uploading big files. Changed in networkmanager the MTU to 1400 (trial and error) and now the upload speed on nfs is around 25 MB/s. Iperf still gives bad results for uploads. On NFS the speed increases from 2 MB/s - 25MB/s in about 5 seconds, so it seems that the TCP algorithm is/was the problem here. [1] http://www.speedtest.net/my-result/6703944909 http://pic.nperf.com/r/184530901-oTbTp0X2.png The WIFI is the bottleneck here as over Ethernet I get ~ 500mbps/200mbps. I hope this helps. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1670041 Title: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
