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#1 2015-03-18 04:34:23

annihilan
Member
Registered: 2010-07-27
Posts: 12

Incredibly flaky wifi signal, both onboard and usb dongle

So I'm having severe issues maintaining a wifi connection.

Output from lspci | grep "Network":

02:00.0 Network controller: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01)

Output from lsusb | grep "WLAN":

Bus 001 Device 002: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter

Output from lsmod:

Module                  Size  Used by
ctr                    12927  3 
ccm                    17534  3 
nvram                  13034  0 
msr                    12677  0 
ecb                    12737  1 
rtl8192cu              66273  0 
rtl_usb                17592  1 rtl8192cu
rtl8192c_common        44268  1 rtl8192cu
rtlwifi                63199  3 rtl_usb,rtl8192c_common,rtl8192cu
btusb                  29996  0 
arc4                   12536  4 
bluetooth             403971  2 btusb
brcmsmac              532199  0 
cordic                 12352  1 brcmsmac
brcmutil               13093  1 brcmsmac
uvcvideo               83143  0 
b43                   414640  0 
videobuf2_vmalloc      12816  1 uvcvideo
videobuf2_memops       12519  1 videobuf2_vmalloc
videobuf2_core         39635  1 uvcvideo
mac80211              608652  5 b43,brcmsmac,rtl_usb,rtlwifi,rtl8192cu
v4l2_common            12995  1 videobuf2_core
videodev              135040  3 uvcvideo,v4l2_common,videobuf2_core
media                  18365  2 uvcvideo,videodev
cfg80211              453926  4 b43,brcmsmac,mac80211,rtlwifi
ssb                    65506  1 b43
hp_wmi                 13238  0 
sparse_keymap          12818  1 hp_wmi
rfkill                 18867  5 cfg80211,hp_wmi,bluetooth
joydev                 17063  0 
mousedev               17272  0 
rng_core               12808  1 b43
pcmcia                 53108  2 b43,ssb
pcmcia_core            18431  1 pcmcia
kvm                   426425  0 
evdev                  21544  11 
mac_hid                12633  0 
radeon               1546803  3 
ttm                    81779  1 radeon
serio_raw              12849  0 
psmouse               107442  0 
pcspkr                 12595  0 
drm_kms_helper         80985  1 radeon
drm                   263481  6 ttm,drm_kms_helper,radeon
k10temp                12588  0 
hwmon                  12930  2 k10temp,radeon
snd_hda_codec_idt      56780  1 
snd_hda_codec_generic    63087  1 snd_hda_codec_idt
snd_hda_codec_hdmi     49263  1 
i2c_algo_bit           12744  1 radeon
bcma                   46116  3 b43,brcmsmac
wmi                    17339  1 hp_wmi
snd_hda_intel          26387  5 
snd_hda_controller     26938  1 snd_hda_intel
snd_hda_codec         112621  5 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep              17244  1 snd_hda_codec
snd_pcm                88785  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
r8169                  80917  0 
snd_timer              26614  1 snd_pcm
snd                    73436  18 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_idt,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
i2c_piix4              20857  0 
hp_accel               25246  0 
rtsx_pci_ms            16898  0 
lis3lv02d              17883  1 hp_accel
i2c_core               50152  7 drm,i2c_piix4,drm_kms_helper,i2c_algo_bit,v4l2_common,radeon,videodev
memstick               13696  1 rtsx_pci_ms
input_polldev          13118  1 lis3lv02d
mii                    12675  1 r8169
soundcore              13031  2 snd,snd_hda_codec
shpchp                 35210  0 
ac                     12715  0 
thermal                17559  0 
battery                17452  0 
video                  18043  0 
button                 12953  0 
acpi_cpufreq           17218  0 
processor              27777  5 acpi_cpufreq
sch_fq_codel           17343  10 
ext4                  510292  1 
crc16                  12343  2 ext4,bluetooth
mbcache                17171  1 ext4
jbd2                   86379  1 ext4
sr_mod                 21903  0 
cdrom                  47479  1 sr_mod
sd_mod                 43575  2 
ata_generic            12490  0 
pata_acpi              12771  0 
rtsx_pci_sdmmc         21261  0 
atkbd                  22254  0 
libps2                 12739  2 atkbd,psmouse
xhci_pci               12675  0 
pata_atiixp            12747  0 
ohci_pci               12808  0 
ohci_hcd               43006  1 ohci_pci
ehci_pci               12512  0 
xhci_hcd              152471  1 xhci_pci
ehci_hcd               69939  1 ehci_pci
ahci                   33248  1 
libahci                27215  1 ahci
sdhci_pci              22137  0 
sdhci                  39051  1 sdhci_pci
led_class              12855  4 b43,sdhci,brcmsmac,hp_accel
libata                181518  5 ahci,pata_acpi,libahci,ata_generic,pata_atiixp
mmc_core              110515  5 b43,ssb,sdhci,rtsx_pci_sdmmc,sdhci_pci
usbcore               199382  10 btusb,uvcvideo,rtl_usb,ohci_hcd,ohci_pci,ehci_hcd,ehci_pci,rtl8192cu,xhci_hcd,xhci_pci
scsi_mod              147580  3 libata,sd_mod,sr_mod
rtsx_pci               41951  2 rtsx_pci_ms,rtsx_pci_sdmmc
usb_common             12561  1 usbcore
i8042                  18002  2 hp_accel,libps2
serio                  18282  7 serio_raw,atkbd,i8042,hp_accel,psmouse

I really have no idea what's going on. I've switched network managers from netctl to NetworkManager and that didn't fix anything.

I'll connect and I'll get a lot of data really fast; great connection. But after five, maybe 10 minutes the connection will decay immediately, slowing down until I lose connection entirely, but I'm not kicked off the network.

I've had this problem before with this broadcom card, that's why I got the Realtek usb dongle, but it hasn't seemed to help.

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#2 2015-03-18 21:35:15

noctlos
Member
Registered: 2013-08-26
Posts: 36

Re: Incredibly flaky wifi signal, both onboard and usb dongle

from https://github.com/pvaret/rtl8192cu-fixes,

Troubleshooting

There is a known issue with power management on some hardware. If your WiFi connection drops after a few minutes, install the following module setting file to disable power management in your WiFi interface:

sudo cp ./rtl8192cu-fixes/8192cu-disable-power-management.conf /etc/modprobe.d/

And then reboot.

hope this helps.

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#3 2015-03-21 11:42:11

annihilan
Member
Registered: 2010-07-27
Posts: 12

Re: Incredibly flaky wifi signal, both onboard and usb dongle

This seems to have worked. You don't know how much stress you have saved me, thank you!

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