Summary; my own rtl8821ae frequent connection lost problem was fixed by upstream patch b8b8b16352cd ("rtlwifi: rtl8821ae: Fix connection lost problem") merged for 4.14-rc4.
I've recently fixed a problem very much like the problems reported in this bug; and during my tests I saw the cycling ping times, the delay unloading the module, and the no buffer space, all of which suggested a firmware hang in the wireless device. My main problem was that connection was lost shortly after it was made, and especially if there was a burst of download data. Workaround was to turn wireless off then on again, or reboot. What I did was (a) test several ubuntu kernels to find which ones were affected, (b) using git bisect, tested several custom kernels, and proved my problem began with a single commit 40b368af4b75 ("rtlwifi: Fix alignment issues"), (c) worked with upstream to determine a likely cause; the commit wasn't widely tested, (d) proved through testing that the BIOS can have an effect; because the rtl8821ae driver does not reset the card, but inherits the card in whatever state the BIOS left it. This can randomise problem reports. (e) proved that a power down and reboot can have a different effect to a warm reboot; some of the wireless card device registers are unchanged on warm reboot. This can randomise problem reports. Hope that helps. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1618267 Title: RTL8821AE abruptly halts all network traffic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1618267/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs