desde a atualização para o Ubuntu 17.04, notei conexões Wifi instáveis (a conexão cai aleatoriamente em redes de 2,4 GHz e 5 GHz). Eu tentei atualizar odrivers iwlwi-fi, mas infelizmente isso não ajudou.
Minha placa de rede é Intel 7265:
Network controller [0280]: Intel Corporation Wireless 7265 [8086:095b] (rev 99)
Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5210]
Kernel driver in use: iwlwifi
Por algumas razões, o Ubuntu parece carregariwflwifi-7265D-26
modinfo iwlwifi | grep 7265
firmware: iwlwifi-7265D-26.ucode
firmware: iwlwifi-7265-17.ucode
que não está presente:
sudo dmesg -T | grep iwl
iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-7265D-26.ucode failed with error -2
iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-7265D-25.ucode failed with error -2
iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-7265D-24.ucode failed with error -2
iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-7265D-23.ucode failed with error -2
iwlwifi 0000:04:00.0: loaded firmware version 22.391740.0 op_mode iwlmvm
iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 7265, REV=0x210
iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
iwlwifi 0000:04:00.0 wlp4s0: renamed from wlan0
iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
...
Na minha /lib/firmwarepasta eu tenho esses arquivos de firmware:
/lib/firmware/iwlwifi-7265-10.ucode
/lib/firmware/iwlwifi-7265-12.ucode
/lib/firmware/iwlwifi-7265-13.ucode
/lib/firmware/iwlwifi-7265-16.ucode
/lib/firmware/iwlwifi-7265-17.ucode
/lib/firmware/iwlwifi-7265-8.ucode
/lib/firmware/iwlwifi-7265-9.ucode
/lib/firmware/iwlwifi-7265D-12.ucode
/lib/firmware/iwlwifi-7265D-13.ucode
/lib/firmware/iwlwifi-7265D-16.ucode
/lib/firmware/iwlwifi-7265D-17.ucode
/lib/firmware/iwlwifi-7265D-21.ucode
/lib/firmware/iwlwifi-7265D-22.ucode
/lib/firmware/iwlwifi-7265D-29.ucode
Qual firmware devo carregar? Qual é a diferença entre 7265e 7265Dfirmware (acho que 2,4/5Ghz?). Por que o Ubuntu não usa o firmware mais recente (7265D-29)?
Obrigado!
PS: Tentei configurar o BSSID para a rede 2,4Ghz e 5Ghz, mas não resolveu o problema.