$ PING www.debian.org(klecker-misc.debian.org (2001:67c:2564:a119::148:14)) 56 data bytes
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=1 ttl=56 time=19481 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=2 ttl=56 time=18474 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=3 ttl=56 time=17450 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=4 ttl=56 time=16426 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=5 ttl=56 time=15402 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=6 ttl=56 time=14379 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=7 ttl=56 time=13355 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=8 ttl=56 time=12331 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=9 ttl=56 time=11307 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=10 ttl=56 time=10283 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=11 ttl=56 time=9259 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=12 ttl=56 time=8235 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=13 ttl=56 time=7211 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=14 ttl=56 time=6187 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=15 ttl=56 time=5164 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=16 ttl=56 time=4140 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=17 ttl=56 time=3112 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=18 ttl=56 time=2092 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=19 ttl=56 time=1068 ms
64 bytes from klecker-misc.debian.org (2001:67c:2564:a119::148:14): icmp_seq=20 ttl=56 time=44.1 ms
^C
--- www.debian.org ping statistics ---
21 packets transmitted, 20 received, 4.7619% packet loss, time 384ms
rtt min/avg/max/mdev = 44.100/9770.030/19481.037/5902.815 ms, pipe 20
丢包还好，但延迟有时会达到20秒。
网卡信息：
description: Wireless interface
product: QCA6174 802.11ac Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:05:00.0
logical name: wlp5s0
version: 32
serial: 74:40:bb:24:89:33
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath10k_pci driverversion=4.19.0-5-amd64 firmware=RM.4.4.1.c2-00057-QCARMSWP-1 ip=192.xxx.x.xx latency=0 link=yes multicast=yes wireless=IEEE 802.11
我正在使用带有内核版本的 Debian 10(buster) 4.19.0-5-amd64，几周前使用 Debian 9 没有任何问题。所以这绝对不是硬件问题。
那么如何解决这个驱动问题呢？我要更换它还是升级/降级它？ （我以前从未调整过 wifi 驱动程序，所以我实际上不知道该怎么做。）