我现在运行的是内核为 4.4 的 Gentoo。当我尝试升级到 4.9 时，我的无线驱动程序 (ath9k) 最终停止工作。在 4.4 上，无线工作正常。
首次在 4.9 上启动时，无线网络会在一段时间内正常工作，但最终连接速度开始减慢并完全停止。我不确定原因是什么，除了与内核版本 4.9 有关。
消息：
[ 654.808240] wlp3s0: authenticate with XX:XX:XX:XX:XX:XX
[ 654.825789] wlp3s0: send auth to XX:XX:XX:XX:XX:XX (try 1/3)
[ 654.827856] wlp3s0: authenticated
[ 654.829768] wlp3s0: associate with XX:XX:XX:XX:XX:XX (try 1/3)
[ 654.833827] wlp3s0: RX AssocResp from XX:XX:XX:XX:XX:XX (capab=0x411 status=0 aid=2)
[ 654.833934] wlp3s0: associated
网络管理器日志：
Feb 12 17:04:15 laptop-gentoo NetworkManager[2116]: <warn> [1486937055.8134] sup-iface[0x1662ab0,wlp3s0]: connection disconnected (reason -4)
Feb 12 17:04:15 laptop-gentoo NetworkManager[2116]: <info> [1486937055.8276] device (wlp3s0): supplicant interface state: completed -> disconnected
Feb 12 17:04:15 laptop-gentoo NetworkManager[2116]: <info> [1486937055.9196] device (wlp3s0): supplicant interface state: disconnected -> scanning
Feb 12 17:04:16 laptop-gentoo NetworkManager[2116]: <info> [1486937056.9935] device (wlp3s0): supplicant interface state: scanning -> authenticating
Feb 12 17:04:17 laptop-gentoo NetworkManager[2116]: <info> [1486937057.0005] device (wlp3s0): supplicant interface state: authenticating -> associated
Feb 12 17:04:17 laptop-gentoo NetworkManager[2116]: <info> [1486937057.0137] device (wlp3s0): supplicant interface state: associated -> 4-way handshake
Feb 12 17:04:17 laptop-gentoo NetworkManager[2116]: <info> [1486937057.0232] device (wlp3s0): supplicant interface state: 4-way handshake -> completed