O Fedora 27 corrigiu o problema. Ainda não tenho certeza de qual foi a raiz disso.
EDIT: O problema se corrigiu com a nova atualização do Fedora 27.
Aviso: Eu tentei fazer esta pergunta no Fedora, mas nunca consegui logar devido a um erro interno do servidor.
Eu fiz o upgrade do Fedora 25 para o Fedora 26 na noite passada, e desde então não consegui trabalhar com Wi-Fi.
Instalei a última versão do rpm nonfree e instalei o akmod-wl, mas sem sorte. Quando atualizei, recebi um aviso sobre dois pacotes incompatíveis que seriam removidos durante a instalação. Um deles era o MySQL Workbench, e o outro eu não tenho certeza, mas acho que pode ter sido o akmod-wl.
Esta é a saída do lspci para minha placa wireless:
07:00.0 Network controller: Ralink corp. RT5390 Wireless 802.11n 1T/1R PCIe
Executando o ifconfig relata 3 interfaces:
$ ifconfig
enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.65 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 2806:105e:4:be65:ed82:5646:cd48:f5bf prefixlen 64 scopeid 0x0<global>
inet6 fdf4:dcf9:823a:7a00:95a2:28d3:a2b8:ee7b prefixlen 64 scopeid 0x0<global>
inet6 2806:105e:4:be65::2 prefixlen 128 scopeid 0x0<global>
inet6 fe80::4da4:f2e9:b18c:dafd prefixlen 64 scopeid 0x20<link>
ether 78:e3:b5:62:40:56 txqueuelen 1000 (Ethernet)
RX packets 1448 bytes 570458 (557.0 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1881 bytes 279806 (273.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 36 bytes 3124 (3.0 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 36 bytes 3124 (3.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether 52:54:00:bc:d3:e3 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
relatórios de endereço IP wlo1 como inativos:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 78:e3:b5:62:40:56 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.65/24 brd 192.168.1.255 scope global dynamic enp1s0
valid_lft 85212sec preferred_lft 85212sec
inet6 2806:105e:4:be65::2/128 scope global dynamic
valid_lft 6015sec preferred_lft 2415sec
inet6 fdf4:dcf9:823a:7a00:95a2:28d3:a2b8:ee7b/64 scope global noprefixroute dynamic
valid_lft 7030sec preferred_lft 3430sec
inet6 2806:105e:4:be65:ed82:5646:cd48:f5bf/64 scope global noprefixroute dynamic
valid_lft 7030sec preferred_lft 3430sec
inet6 fe80::4da4:f2e9:b18c:dafd/64 scope link
valid_lft forever preferred_lft forever
3: wlo1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 60:d8:19:8b:37:3a brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:bc:d3:e3 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
5: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:bc:d3:e3 brd ff:ff:ff:ff:ff:ff
Alguma ideia do que posso fazer para que o wifi funcione de novo? Antes da atualização para o Fedora 26 wifi funcionou sem problemas.