Lots of talk about bandwidth, but (IMHO) at least as interesting is ping times (because the results are instantly visible):
I'm on a ThinkPad T431s with an "Intel Corporation Centrino Advanced-N 6235 (rev 24)" 3.13.0-24-generic without PM (pinging my AP): $ ping -c 5 192.168.8.2 PING 192.168.8.2 (192.168.8.2) 56(84) bytes of data. 64 bytes from 192.168.8.2: icmp_seq=1 ttl=64 time=0.882 ms 64 bytes from 192.168.8.2: icmp_seq=2 ttl=64 time=0.948 ms 64 bytes from 192.168.8.2: icmp_seq=3 ttl=64 time=0.960 ms 64 bytes from 192.168.8.2: icmp_seq=4 ttl=64 time=0.768 ms 64 bytes from 192.168.8.2: icmp_seq=5 ttl=64 time=0.848 ms --- 192.168.8.2 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4002ms rtt min/avg/max/mdev = 0.768/0.881/0.960/0.072 ms 3.13.0-24-generic with PM (pinging my AP): $ ping -c 5 192.168.8.2 PING 192.168.8.2 (192.168.8.2) 56(84) bytes of data. 64 bytes from 192.168.8.2: icmp_seq=1 ttl=64 time=96.9 ms 64 bytes from 192.168.8.2: icmp_seq=2 ttl=64 time=17.2 ms 64 bytes from 192.168.8.2: icmp_seq=3 ttl=64 time=39.4 ms 64 bytes from 192.168.8.2: icmp_seq=4 ttl=64 time=61.9 ms 64 bytes from 192.168.8.2: icmp_seq=5 ttl=64 time=84.7 ms --- 192.168.8.2 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4005ms rtt min/avg/max/mdev = 17.298/60.076/96.938/29.065 ms -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1289961 Title: 8086:08b2 [Lenovo ThinkPad T440s] Power management causes Intel wifi 7260 slowness To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1289961/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
