Realtek Wireless connection hiccups

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Realtek Wireless connection hiccups

Postby Barti90 on Thu Nov 01, 2012 3:25 pm

Hello there,
I've recently installed LMDE and encountered some problems with wireless. Network manager shows the network as "established" but, in practice, the connection fluctuates from "slow" to "non responding" (pinging 8.8.8.8 shows "destination host unreachable), then back to "slow". I have no idea what's wrong (I'm dual booting with Win7 where everything works fine). Previously I worked on Ubuntu 12.04 and had similar problems.

Output of some commands:

- iwconfig
Code: Select all
lo        no wireless extensions.

eth1      no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"UPC011225" 
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:24:D1:7A:1F:AA   
          Bit Rate=1 Mb/s   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr=2347 B   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=50/70  Signal level=-60 dBm 
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0


- ifconfig
Code: Select all
eth1      Link encap:Ethernet  HWaddr 60:eb:69:f1:99:d7 
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:48

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:26855 errors:0 dropped:0 overruns:0 frame:0
          TX packets:26855 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:73805547 (70.3 MiB)  TX bytes:73805547 (70.3 MiB)

wlan0     Link encap:Ethernet  HWaddr 68:a3:c4:6e:ec:40 
          inet addr:192.168.0.16  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::6aa3:c4ff:fe6e:ec40/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:7622 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6406 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:6143178 (5.8 MiB)  TX bytes:1038808 (1014.4 KiB)


- lspci | grep Network
Code: Select all
09:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)


- lsmod
Code: Select all
Module                  Size  Used by
aes_x86_64             16796  1
aes_generic            33026  1 aes_x86_64
cpufreq_stats          12866  0
cpufreq_conservative    13147  0
cpufreq_userspace      12576  0
cpufreq_powersave      12454  0
binfmt_misc            12957  1
fuse                   61981  1
loop                   22641  0
dm_crypt               22586  0
dm_mod                 63545  1 dm_crypt
snd_hda_codec_hdmi     30783  4
arc4                   12458  2
nvidia              10823460  41
snd_hda_codec_conexant    45252  1
rtl8192ce             132562  0
snd_hda_intel          26345  3
snd_hda_codec          78031  3 snd_hda_intel,snd_hda_codec_conexant,snd_hda_codec_hdmi
snd_hwdep              13186  1 snd_hda_codec
snd_pcm_oss            41081  0
snd_mixer_oss          17916  1 snd_pcm_oss
snd_pcm                63900  4 snd_pcm_oss,snd_hda_codec,snd_hda_intel,snd_hda_codec_hdmi
rtlwifi               110243  1 rtl8192ce
snd_page_alloc         13003  2 snd_pcm,snd_hda_intel
snd_seq_midi           12848  0
snd_seq_midi_event     13316  1 snd_seq_midi
mac80211              192768  2 rtlwifi,rtl8192ce
cfg80211              137140  2 mac80211,rtlwifi
snd_rawmidi            23060  1 snd_seq_midi
uvcvideo               57744  0
videodev               70889  1 uvcvideo
v4l2_compat_ioctl32    16655  1 videodev
snd_seq                45093  2 snd_seq_midi_event,snd_seq_midi
snd_seq_device         13176  3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer              22917  2 snd_seq,snd_pcm
media                  18148  2 videodev,uvcvideo
snd                    52850  18 snd_timer,snd_seq_device,snd_seq,snd_rawmidi,snd_pcm,snd_mixer_oss,snd_pcm_oss,snd_hwdep,snd_hda_codec,snd_hda_intel,snd_hda_codec_conexant,snd_hda_codec_hdmi
iTCO_wdt               17081  0
i2c_i801               16870  0
iTCO_vendor_support    12704  1 iTCO_wdt
joydev                 17266  0
i2c_core               23876  3 i2c_i801,videodev,nvidia
toshiba_acpi           17649  0
sparse_keymap          12760  1 toshiba_acpi
rfkill                 19012  4 toshiba_acpi,cfg80211
coretemp               12898  0
acpi_cpufreq           12935  1
soundcore              13065  1 snd
battery                13109  0
mperf                  12453  1 acpi_cpufreq
evdev                  17562  21
wmi                    13243  0
psmouse                64455  0
serio_raw              12931  0
pcspkr                 12579  0
video                  17628  0
processor              28157  1 acpi_cpufreq
button                 12937  0
ac                     12624  0
thermal_sys            18040  2 processor,video
power_supply           13475  2 ac,battery
ext4                  350411  2
crc16                  12343  1 ext4
jbd2                   62015  1 ext4
mbcache                13065  1 ext4
btrfs                 505480  0
libcrc32c              12426  1 btrfs
zlib_deflate           25638  1 btrfs
sd_mod                 36136  4
crc_t10dif             12348  1 sd_mod
sr_mod                 21899  0
cdrom                  35401  1 sr_mod
usbhid                 36379  0
hid                    81288  1 usbhid
ehci_hcd               40215  0
crc32c_intel           12747  1
ghash_clmulni_intel    13133  0
cryptd                 14517  1 ghash_clmulni_intel
ahci                   24997  3
libahci                22860  1 ahci
libata                140589  2 libahci,ahci
xhci_hcd               73170  0
scsi_mod              162372  3 libata,sr_mod,sd_mod
usbcore               128498  5 xhci_hcd,ehci_hcd,usbhid,uvcvideo
usb_common             12354  1 usbcore
atl1c                  32258  0


I tried reinstalling drivers; downloaded newest from Realtek website, compiled, installed, but nothing changed.
The machine is Toshiba L750 i5-2410m.
Cheers
Barti90
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Re: Realtek Wireless connection hiccups

Postby telenux on Sun Nov 11, 2012 9:44 pm

You shouldn't have to install from the Realtek website and compile? Since, you have wifi working to some extent, you must have installed the realtek firmware? Non-free sources are in the repo and you did an apt-get update etc.?

http://wiki.debian.org/rtl819x

Is it possible there could be some interference, possibly with router or with the laptop?

Edit: Do you have any other computer to test where you connect to the internet? The connection itself could have issues, perhaps? I guess I am just suggesting to eliminate any potential culprit and troubleshoot that way.
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Re: Realtek Wireless connection hiccups

Postby ltnemo2000 on Thu Nov 15, 2012 7:16 pm

Im having the same problem.
ping to 1.1.1.1 returns "destination host unreachable"
when it does connect its slow.
Im running the same card with the rtl8192ce driver
im thinking the current driver doesn't work that well.
there any alternatives? (other than getting a new card that is...)

UPDATE:
found this official new driver from realtek.
http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=1&PNid=48&PFid=48&Level=5&Conn=4&DownTypeID=3&GetDown=false&Downloads=true#2722
"We don't support kernel 2.6.24-2.6.34 directly, Because there are
lots of issues in mac80211 from kernel 2.6.24-2.6.34,
So we suggest you to use the latest kernel >= 2.6.35."
-Realtek Driver Readme

this is where my experience runs out.
Im going to need help compiling this driver from source.
see: http://forums.debian.net/viewtopic.php?f=7&t=88325#p461653
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