RTL8723be wifi trabalhando muito devagar

Question

Ok por alguns dias.Inicialmente quando eu instalei o Ubuntu 14.04 lts wifi não estava funcionando em todos.Mas depois de algumas correções eu fiz o trabalho, embora ainda não é muito estável e é lento. Eu tentei na seguinte ordem:

1. Instalando o novo driver de acordo com a primeira resposta dada nesta página Conexão WiFi instável Ubuntu 14.04 - Lenovo G40-70 rtl8723be
2. Instalando outro driver de acordo com a primeira resposta dada nesta página Wifi problemas com rtl8723be no Ubuntu 14.04
3. Em vez de atualizar meu kernel para 3.16.0-031600-genérico.
4. Em vez de aplicar echo "options rtl8723be fwlps=0" | sudo tee /etc/modprobe.d/rtl8723be.conf de acordo com as informações fornecidas no link

Não é que o wifi não esteja funcionando, mas está trabalhando muito devagar a ponto de frustar. Saída do lspci:

00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09)
00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
00:04.0 Signal processing controller: Intel Corporation Broadwell-U Camarillo Device (rev 09)
00:14.0 USB controller: Intel Corporation Wildcat Point-LP USB xHCI Controller (rev 03)
00:16.0 Communication controller: Intel Corporation Wildcat Point-LP MEI Controller #1 (rev 03)
00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #1 (rev e3)
00:1c.2 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #3 (rev e3)
00:1c.5 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #6 (rev e3)
00:1d.0 USB controller: Intel Corporation Wildcat Point-LP USB EHCI Controller (rev 03)
00:1f.0 ISA bridge: Intel Corporation Wildcat Point-LP LPC Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] (rev 03)
00:1f.3 SMBus: Intel Corporation Wildcat Point-LP SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation Wildcat Point-LP Thermal Management Controller (rev 03)
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 07)
0d:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter

Saída de iw dev wlan0 station dump :

Station c4:e9:84:87:e1:86 (on wlan0)
    inactive time:  48 ms
    rx bytes:   3331226
    rx packets: 15891
    tx bytes:   1163486
    tx packets: 4703
    tx retries: 0
    tx failed:  0
    signal:     -74 dBm
    signal avg: -73 dBm
    tx bitrate: 150.0 MBit/s MCS 7 40Mhz short GI
    authorized: yes
    authenticated:  yes
    preamble:   long
    WMM/WME:    yes
    MFP:        no
    TDLS peer:      no

Qualquer ajuda seria muito apreciada.

Editar 12/05/2015:

Acabei de atualizar para o 16.04. Tudo está funcionando bem, exceto o Wi-Fi. Problema permanece o mesmo.Wifi permanece conectado, mas funciona muito lento.Provavelmente mais lento do que antes.Assim, as saídas são:

00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09)
00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
00:04.0 Signal processing controller: Intel Corporation Broadwell-U Camarillo Device (rev 09)
00:14.0 USB controller: Intel Corporation Wildcat Point-LP USB xHCI Controller (rev 03)
00:16.0 Communication controller: Intel Corporation Wildcat Point-LP MEI Controller #1 (rev 03)
00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #1 (rev e3)
00:1c.2 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #3 (rev e3)
00:1c.5 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #6 (rev e3)
00:1d.0 USB controller: Intel Corporation Wildcat Point-LP USB EHCI Controller (rev 03)
00:1f.0 ISA bridge: Intel Corporation Wildcat Point-LP LPC Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] (rev 03)
00:1f.3 SMBus: Intel Corporation Wildcat Point-LP SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation Wildcat Point-LP Thermal Management Controller (rev 03)
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller (rev 07)
0d:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter

e de iw dev wlan0 station dump é:

Station c4:e9:84:87:e1:86 (on wlan0)
    inactive time:  2404 ms
    rx bytes:   1351602
    rx packets: 8268
    tx bytes:   524504
    tx packets: 1874
    tx retries: 0
    tx failed:  0
    signal:     -66 dBm
    signal avg: -66 dBm
    tx bitrate: 150.0 MBit/s MCS 7 40MHz short GI
    rx bitrate: 1.0 MBit/s
    authorized: yes
    authenticated:  yes
    preamble:   long
    WMM/WME:    yes
    MFP:        no
    TDLS peer:  no