No wifi signal.....

[Lucifuge138]

Just got a new laptop and after installing PCLOS kde, I'm having a problem with the wi-fi.

It works great until I put the computer into sleep mode.  After waking it up, I can't find any wi-fi signals at all.

I have to reboot the computer to get the wi-fi signal back.

Any ideas on how to fix this?

Thanks

[T6]

the card seems to be not waking up

you can try this command in konsole to see if it wakes up

ifconfig wlan0 up

you might have to do it as root so write su and press enter, then write the root password and then enter and finally the command mentioned

[Lucifuge138]

No go.  Still not picking up any signals.

[T6]

ok

please write this command in console and post resutls

lspci

also this one

uname -r

[Lucifuge138]

Alright, here's what I got

lspci:

00:00.0 Host bridge: Advanced Micro Devices [AMD] Family 14h Processor Root Complex
00:01.0 VGA compatible controller: ATI Technologies Inc Device 9804
00:11.0 SATA controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode]
00:12.0 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:12.2 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:13.0 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:13.2 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 42)
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA) (rev 40)
00:14.3 ISA bridge: ATI Technologies Inc SB7x0/SB8x0/SB9x0 LPC host controller (rev 40)
00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge (rev 40)
00:15.0 PCI bridge: ATI Technologies Inc Device 43a0
00:15.1 PCI bridge: ATI Technologies Inc Device 43a1
00:16.0 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:16.2 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 0 (rev 43)
00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 1
00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 2
00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 3
00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 4
00:18.5 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 6
00:18.6 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 5
00:18.7 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 7
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)
06:00.0 Ethernet controller: Atheros Communications AR8152 v1.1 Fast Ethernet (rev c1)


and uname -r:

2.6.38.8-pclos3.bfs

[travisN000]

Based on what you posted, you have a Realtek RTL8188CE wifi chipset.. a quick google makes it look like this is a common problem with few solutions..  I did find this though:


http://ubuntuforums.org/showthread.php?t=1770202

Let's see the result of these commands (as root):

Code:

rmmod -f acer-wmi
rfkill unblock all
rfkill list all

..and try wifi again; if it works there are instruction at the link on how to blacklist that module permanently.

[Lucifuge138]

I've got a Toshiba, not an Acer.  I tried entering Toshiba instead of Acer and it still didn't work.

[travisN000]

From what I read there is most likely a wmi or acpi driver / module that is not functioning properly with your hardware... (same as T6 suggested).   We need to identify it and block it from loading.  

Try the commands as written...  verify that you have rfkill installed in synaptic first.  

If it doesn't work, post the output of the following commands so we can see what drivers ("modules" in linux) your PC is running:

Code:

rfkill list
lsmod

[Meemaw]

From what I read there is most likely a wmi or acpi driver / module that is not functioning properly with your hardware... (same as T6 suggested).   We need to identify it and block it from loading.  

Try the commands as written...  verify that you have rfkill installed in synaptic first.  

If it doesn't work, post the output of the following commands so we can see what drivers ("modules" in linux) your PC is running:

Code:

rfkill list
lsmod

I agree... and try that first. Another possibility is that the driver is dropped when sleep mode is entered... see here;

http://ubuntuforums.org/showpost.php?p=11011525&postcount=2

You'll have to substitute your driver info for his.
(chili555 is VERY smart!!!)     

[Lucifuge138]

rfkill was not installed.   I installed it, still no difference.....

Here's what I got:


rfkill list
0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no


lsmod
Module                  Size  Used by
snd_usb_audio          70631  0
snd_usbmidi_lib        15440  1 snd_usb_audio
snd_rawmidi            15287  1 snd_usbmidi_lib
cryptd                  6989  0
aes_i586                6948  1
aes_generic            25998  1 aes_i586
af_packet              17321  4
ipv6                  266689  18
snd_hda_codec_conexant    35862  1
snd_hda_intel          19109  2
snd_hda_codec          66310  2 snd_hda_codec_conexant,snd_hda_intel
snd_hwdep               4820  2 snd_usb_audio,snd_hda_codec
snd_seq_dummy           1135  0
snd_seq_oss            25264  0
snd_seq_midi_event      4648  1 snd_seq_oss
snd_seq                42136  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device          4457  4 snd_rawmidi,snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss            33854  0
snd_pcm                60446  4 snd_usb_audio,snd_hda_intel,snd_hda_codec,snd_pcm_oss
arc4                    1126  2
snd_timer              15383  2 snd_seq,snd_pcm
snd_mixer_oss          12981  1 snd_pcm_oss
uvcvideo               55339  0
ecb                     1645  2
snd                    43189  18 snd_usb_audio,snd_usbmidi_lib,snd_rawmidi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_pcm,snd_timer,snd_mixer_oss
rtl8192ce             110597  0
rtlwifi                68042  1 rtl8192ce
uas                     6482  0
mac80211              189461  2 rtl8192ce,rtlwifi
sg                     23483  0
i2c_piix4               7124  0
videodev               56533  1 uvcvideo
shpchp                 22549  0
i2c_core               16500  2 i2c_piix4,videodev
atl1c                  28460  0
soundcore               5025  1 snd
cfg80211              126787  2 rtlwifi,mac80211
sr_mod                 13510  0
sp5100_tco              3764  0
usb_storage            35068  0
pci_hotplug            21835  1 shpchp
snd_page_alloc          5877  2 snd_hda_intel,snd_pcm
cdrom                  31506  1 sr_mod
binfmt_misc             5850  1
nvram                   4805  0
firewire_ohci          25329  0
firewire_sbp2          11541  0
firewire_core          43040  2 firewire_ohci,firewire_sbp2
crc_itu_t               1103  1 firewire_core
fuse                   59455  1
dm_mod                 58938  0
fglrx                2547889  159
sparse_keymap           2484  0
video                  10008  0
thermal                 6670  0
rfkill                 12694  1 cfg80211
battery                 8843  0
ac                      2545  0
button                  4021  1 fglrx
fan                     1910  0
processor              22399  2
evdev                   7275  12
k10temp                 2147  0
ata_piix               18602  0
ahci                   17997  3
libahci                16163  1 ahci
libata                154591  3 ata_piix,ahci,libahci
sd_mod                 31682  4
scsi_mod              150520  7 uas,sg,usb_storage,sr_mod,firewire_sbp2,libata,sd_mod
crc_t10dif              1104  1 sd_mod
ext4                  312169  2
jbd2                   59959  1 ext4
crc16                   1099  1 ext4
uhci_hcd               19499  0
ohci_hcd               19566  0
ehci_hcd               35439  0
usbhid                 31267  0
hid                    63565  1 usbhid
usbcore               117639  10 snd_usb_audio,snd_usbmidi_lib,uvcvideo,uas,usb_storage,uhci_hcd,ohci_hcd,ehci_hcd,usbhid

[travisN000]

rfkill -list shows that nothing is actively shutting down your wifi...  was wifi functioning normally at the time you ran the command?  

the rfkill -list command should be used when wifi not responding as expected to see if there is something in your system that is actively blocking it ("rfkill unblock all" can be used to re-enable a blocked wifi device if the -list option shows it as such)


looking at the output of the lsmod command I see the correct wifi driver:   rtl8192ce

I don't see any acpi / wmi drivers that could be blocking your wifi...  this is consistent with the output of rfkill  
(I don't really know what all of those drivers do..  ).

The next thing to try is to replicate your problem, check to see if the driver is loaded, and then reload the driver..

With your wifi problem replicated, try the following sequence of commands:

Code:

# just to see where we are starting from..
rfkill -list

su
<enter root password at prompt>

# see if the driver is loaded..
# the following command should print at lease one line with the driver.. if it doesn't your driver isn't loaded
lsmod | grep rtl8192ce

# unload the driver if it is already loaded
rmmod -f rtl8192ce

# reload the driver
modprobe rtl8192ce

..if after loading / reloading the driver you are able to start your wifi, then you can follow the instruction suggested by meemaw to try and make this process happen automatically (your driver is rtl8192ce ).

[Lucifuge138]

Here's the rfkill -list while having the problem:

rfkill -list
Usage:  rfkill [options] command
Options:
        --version       show version (0.4)
Commands:
        help
        event
        list [IDENTIFIER]
        block IDENTIFIER
        unblock IDENTIFIER
where IDENTIFIER is the index no. of an rfkill switch or one of:
        <idx> all wifi wlan bluetooth uwb ultrawideband wimax wwan gps fm


"rfkill unblock all"  didn't yield any results.

"lsmod | grep rtl8192ce" did print lines with the driver.

Unloading and reloading the driver also yielded no results.

[travisN000]

I made a mistake in the rfkill command..

It should be:

Code:

rfkill list

(..no "-" character before the word list)

[Lucifuge138]

The code gives the same result as before:

rfkill list
0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no


I just found something that might be of interest.  I never noticed it before, but the Network Center lists my wifi adapter is an rtl8188ce not the rtl8192ce that's showing up in the code.

[Meemaw]

If you do the command

lsmod | grep rtl8188ce

do you get lines with that driver?