Inconsistent behavior of ALFA AWUS036H usb card

chefarov · 09-19-2014, 03:03 PM

Hello all,

I am facing an amazingly confusing, peculiar situation with the above WLAN card when moving it from a Debian Desktop to a Ubuntu/Kali laptop.

The card works almost always fine when connected to the laptop (some lagging sometimes but its ok)

When I move it to the desktop Pc I get pages loading.. and loading.. ending up either with page displayed but hanged up, or with incomplete page or connection timeout. After some time I may get a working browsing situation but after some time it will come back lagging..

Same position, same time (switching the card over and over) the same situation. The access point is a router in the other side of the house (65-85)% signal.

The only thing that may differetiate sometimes is that in desktop "ping" seems to lose some ICMP ACKs' since it responds like
icmp_seq=3
icmp_seq=5
icmp_seq=6
icmp_seq=7
icmp_seq=10
icmp_seq=11
(time is the same 50-100ms, rare cases:200-1000ms)
but even when it doesn't (aka: ICMPs come without loses) the problem persists.

All the above OSes use the same driver: RTL8187 and

Code:

lsmod | grep rtl8187

gives something like:

Code:

rtl8187                59463  0 
eeprom_93cx6           12625  1 rtl8187
mac80211              464019  1 rtl8187
cfg80211              412187  2 mac80211,rtl8187
usbcore               158411  5 uhci_hcd,rtl8187,ehci_hcd,ehci_pci,usbhid

args /
in both PCs

Laptop (working):
Ubuntu 12.04, kernel : 3.13.0-35-generic x86_84
Kali Linux: SMP Debian 3.7.2-0+kali8 i686

Desktop (problem):
Linux debian 3.14-1-amd64 #1 SMP Debian 3.14.10-1 (2014-07-07) x86_64 GNU/Linux

I am struggling to think of anything relevant that could be different between the 2 PCs. Any thoughts, even long shots ?

Thanks for your time, and excuse me for the unbelievable story but it happens for sure.

ondoho · 09-20-2014, 06:39 AM

to start with, you should give us actual command output (not "something like") for both computers.
both commands please, ping and lsmod.
and use code tags please.

i swear, if you post 100 lines of ping output without code tags, i'm not going to read it.

chefarov · 09-20-2014, 10:06 AM

Desktop/Debian (problem):

Code:

chefarov@debian:~$ ping google.gr
PING google.gr (74.125.230.88) 56(84) bytes of data.
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=1 ttl=52 time=60.2 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=2 ttl=52 time=62.5 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=3 ttl=52 time=60.0 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=4 ttl=52 time=61.0 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=5 ttl=52 time=59.7 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=6 ttl=52 time=61.4 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=7 ttl=52 time=60.8 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=8 ttl=52 time=63.6 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=9 ttl=52 time=59.9 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=10 ttl=52 time=60.7 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=11 ttl=52 time=60.7 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=12 ttl=52 time=59.6 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=13 ttl=52 time=59.5 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=14 ttl=52 time=63.2 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=15 ttl=52 time=60.5 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=16 ttl=52 time=60.0 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=17 ttl=52 time=63.2 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=18 ttl=52 time=60.6 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=19 ttl=52 time=59.4 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=20 ttl=52 time=60.7 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=21 ttl=52 time=60.1 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=22 ttl=52 time=60.0 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=23 ttl=52 time=61.9 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=24 ttl=52 time=62.4 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=25 ttl=52 time=60.6 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=26 ttl=52 time=60.3 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=27 ttl=52 time=60.5 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=28 ttl=52 time=61.2 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=29 ttl=52 time=65.7 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=30 ttl=52 time=62.1 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=31 ttl=52 time=78.2 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=32 ttl=52 time=101 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=33 ttl=52 time=59.8 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=34 ttl=52 time=67.7 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=35 ttl=52 time=63.4 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=36 ttl=52 time=61.8 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=37 ttl=52 time=66.4 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=40 ttl=52 time=60.2 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=41 ttl=52 time=61.4 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=45 ttl=52 time=60.0 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=47 ttl=52 time=60.1 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=48 ttl=52 time=62.3 ms
64 bytes from lhr14s23-in-f24.1e100.net (74.125.230.88): icmp_seq=51 ttl=52 time=60.4 ms

Code:

chefarov@debian:~$ lsmod
Module                  Size  Used by
nls_utf8               12456  1 
nls_cp437              16553  1 
vfat                   17316  1 
fat                    45642  1 vfat
cryptd                 14517  0 
aes_x86_64             16843  1 
aes_generic            33026  1 aes_x86_64
binfmt_misc            12957  1 
nfsd                  216170  2 
nfs                   308353  0 
nfs_acl                12511  2 nfs,nfsd
auth_rpcgss            37143  2 nfs,nfsd
fscache                36739  1 nfs
lockd                  67306  2 nfs,nfsd
sunrpc                173730  6 lockd,auth_rpcgss,nfs_acl,nfs,nfsd
arc4                   12458  4 
rtl8187                35473  0 
eeprom_93cx6           12497  1 rtl8187
mac80211              192806  1 rtl8187
cfg80211              137243  2 mac80211,rtl8187
usb_storage            43870  1 
rfkill                 19012  4 cfg80211
nouveau               583385  3 
mxm_wmi                12515  1 nouveau
wmi                    13243  2 mxm_wmi,nouveau
evdev                  17562  7 
video                  17683  1 nouveau
snd_hda_codec_realtek   188851  1 
ttm                    53664  1 nouveau
drm_kms_helper         31370  1 nouveau
snd_hda_intel          26259  2 
coretemp               12898  0 
drm                   183952  5 drm_kms_helper,ttm,nouveau
snd_hda_codec          78031  2 snd_hda_intel,snd_hda_codec_realtek
i2c_i801               16870  0 
snd_hwdep              13186  1 snd_hda_codec
pcspkr                 12579  0 
psmouse                69265  0 
power_supply           13475  1 nouveau
i2c_algo_bit           12841  1 nouveau
serio_raw              12931  0 
i2c_core               23876  5 i2c_algo_bit,i2c_i801,drm,drm_kms_helper,nouveau
snd_pcm_oss            41081  0 
snd_mixer_oss          17916  1 snd_pcm_oss
iTCO_wdt               17081  0 
snd_pcm                68083  3 snd_pcm_oss,snd_hda_codec,snd_hda_intel
snd_page_alloc         13003  2 snd_pcm,snd_hda_intel
snd_timer              22917  1 snd_pcm
snd                    52889  12 snd_timer,snd_pcm,snd_mixer_oss,snd_pcm_oss,snd_hda_codec,snd_hwdep,snd_hda_intel,snd_hda_codec_realtek
soundcore              13065  1 snd
iTCO_vendor_support    12704  1 iTCO_wdt
rng_core               12652  0 
i82975x_edac           12610  0 
edac_core              35258  1 i82975x_edac
processor              28149  0 
asus_atk0110           17297  0 
button                 12937  1 nouveau
shpchp                 31293  0 
thermal_sys            18040  2 processor,video
loop                   22641  0 
fuse                   61972  3 
autofs4                27628  2 
ext4                  350763  2 
crc16                  12343  1 ext4
jbd2                   62115  1 ext4
mbcache                13114  1 ext4
usbhid                 36418  0 
hid                    81372  1 usbhid
sg                     25874  0 
sr_mod                 21899  0 
cdrom                  35401  1 sr_mod
sd_mod                 36136  6 
crc_t10dif             12348  1 sd_mod
ata_generic            12479  0 
uhci_hcd               26865  0 
floppy                 53134  0 
ehci_hcd               40249  0 
pata_jmicron           12472  0 
firewire_ohci          35772  0 
ata_piix               29535  3 
ahci                   24997  0 
libahci                22941  1 ahci
firewire_core          48449  1 firewire_ohci
crc_itu_t              12347  1 firewire_core
libata                140630  5 libahci,ahci,ata_piix,pata_jmicron,ata_generic
usbcore               128741  6 ehci_hcd,uhci_hcd,usbhid,usb_storage,rtl8187
sky2                   45442  0 
scsi_mod              162269  5 libata,sd_mod,sr_mod,sg,usb_storage
usb_common             12354  1 usbcore

Code:

chefarov@debian:~$ lsmod | grep rtl8187
rtl8187                35473  0 
eeprom_93cx6           12497  1 rtl8187
mac80211              192806  1 rtl8187
cfg80211              137243  2 mac80211,rtl8187
usbcore               128741  6 ehci_hcd,uhci_hcd,usbhid,usb_storage,rtl8187

Laptop/Ubuntu:

Code:

64 bytes from lhr08s06-in-f24.1e100.net (74.125.230.248): icmp_req=1 ttl=52 time=374 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=2 ttl=52 time=62.0 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=3 ttl=52 time=63.7 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=4 ttl=52 time=61.5 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=5 ttl=52 time=62.1 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=6 ttl=52 time=62.8 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=7 ttl=52 time=64.1 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=8 ttl=52 time=61.5 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=9 ttl=52 time=61.6 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=10 ttl=52 time=64.0 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=11 ttl=52 time=63.2 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=12 ttl=52 time=62.0 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=13 ttl=52 time=60.8 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=14 ttl=52 time=61.7 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=15 ttl=52 time=62.5 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=16 ttl=52 time=61.9 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=17 ttl=52 time=64.9 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=18 ttl=52 time=61.7 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=19 ttl=52 time=61.8 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=20 ttl=52 time=62.1 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=21 ttl=52 time=61.3 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=22 ttl=52 time=61.1 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=23 ttl=52 time=62.1 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=24 ttl=52 time=62.3 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=25 ttl=52 time=62.6 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=26 ttl=52 time=61.5 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=27 ttl=52 time=61.9 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=28 ttl=52 time=62.2 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=29 ttl=52 time=62.1 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=30 ttl=52 time=63.4 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=31 ttl=52 time=62.0 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=32 ttl=52 time=63.3 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=33 ttl=52 time=65.9 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=34 ttl=52 time=61.8 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=35 ttl=52 time=65.5 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=36 ttl=52 time=61.4 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=37 ttl=52 time=62.3 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=38 ttl=52 time=61.8 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=39 ttl=52 time=66.1 ms
64 bytes from par08s10-in-f24.1e100.net (74.125.230.248): icmp_req=40 ttl=52 time=62.1 ms

Code:

chefarov@redoctober:~$ lsmod 
Module                  Size  Used by
ctr                    13193  1 
ccm                    17856  1 
rtl8187                65271  0 
mac80211              658125  1 rtl8187
eeprom_93cx6           13344  1 rtl8187
michael_mic            12612  0 
arc4                   12573  2 
snd_hda_codec_hdmi     47006  4 
lib80211_crypt_tkip    17673  0 
uvcvideo               82247  0 
wl                   3074978  0 
videobuf2_core         40972  1 uvcvideo
videodev              139761  2 uvcvideo,videobuf2_core
videobuf2_vmalloc      13216  1 uvcvideo
snd_hda_codec_conexant    57438  1 
snd_hda_intel          57222  4 
snd_hda_codec         199156  3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
videobuf2_memops       13362  1 videobuf2_vmalloc
snd_hwdep              13613  1 snd_hda_codec
snd_pcm               107140  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_seq_midi           13324  0 
snd_rawmidi            30465  1 snd_seq_midi
snd_seq_midi_event     14899  1 snd_seq_midi
nouveau              1116672  3 
snd_seq                66061  2 snd_seq_midi,snd_seq_midi_event
snd_timer              30038  2 snd_pcm,snd_seq
joydev                 17575  0 
snd_seq_device         14497  3 snd_seq_midi,snd_rawmidi,snd_seq
bnep                   19884  2 
rfcomm                 74748  0 
snd                    73890  19 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_seq_midi,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore              12680  1 snd
snd_page_alloc         18798  2 snd_hda_intel,snd_pcm
ttm                    90134  1 nouveau
cfg80211              502970  3 rtl8187,mac80211,wl
drm_kms_helper         53540  1 nouveau
bluetooth             411194  10 bnep,rfcomm
drm                   308868  5 nouveau,ttm,drm_kms_helper
i2c_algo_bit           13564  1 nouveau
mei_me                 18674  0 
lib80211               14381  2 lib80211_crypt_tkip,wl
psmouse               113295  0 
mei                    87127  1 mei_me
mxm_wmi                13021  1 nouveau
lpc_ich                21163  0 
mac_hid                13253  0 
parport_pc             32866  0 
video                  19914  1 nouveau
wmi                    19363  2 nouveau,mxm_wmi
ideapad_laptop         18462  0 
sparse_keymap          13890  1 ideapad_laptop
serio_raw              13462  0 
ppdev                  17711  0 
lp                     17799  0 
parport                42481  3 parport_pc,ppdev,lp
binfmt_misc            17508  1 
ahci                   30063  3 
libahci                32825  1 ahci
r8169                  73299  0 
mii                    13981  1 r8169

Code:

chefarov@redoctober:~$ lsmod | grep rtl8187
rtl8187                65271  0 
mac80211              658125  1 rtl8187
eeprom_93cx6           13344  1 rtl8187
cfg80211              502970  3 rtl8187,mac80211,wl

Laptop/Kali:

Code:

$lsmod
Module                  Size  Used by
hid_generic            12362  0 
usbhid                 35909  0 
hid                    64445  2 hid_generic,usbhid
ipt_MASQUERADE         12531  1 
xt_state               12456  1 
ipt_REJECT             12455  2 
xt_tcpudp              12507  4 
iptable_filter         12489  1 
nf_nat_h323            12802  0 
nf_conntrack_h323      38019  1 nf_nat_h323
nf_nat_pptp            12540  0 
nf_nat_proto_gre       12470  1 nf_nat_pptp
nf_conntrack_pptp      12654  1 nf_nat_pptp
nf_conntrack_proto_gre    13010  1 nf_conntrack_pptp
nf_nat_tftp            12391  0 
nf_conntrack_tftp      12402  1 nf_nat_tftp
nf_nat_sip             12855  0 
nf_conntrack_sip       17686  1 nf_nat_sip
nf_nat_irc             12415  0 
nf_conntrack_irc       12396  1 nf_nat_irc
nf_nat_ftp             12421  0 
nf_conntrack_ftp       12572  1 nf_nat_ftp
iptable_nat            12575  1 
nf_conntrack_ipv4      18126  2 
nf_defrag_ipv4         12444  1 nf_conntrack_ipv4
nf_nat_ipv4            12857  1 iptable_nat
nf_nat                 17968  10 nf_nat_ftp,nf_nat_irc,nf_nat_sip,ipt_MASQUERADE,nf_nat_proto_gre,nf_nat_h323,nf_nat_ipv4,nf_nat_pptp,nf_nat_tftp,iptable_nat
nf_conntrack           48537  19 nf_nat_ftp,nf_nat_irc,nf_nat_sip,nf_conntrack_proto_gre,ipt_MASQUERADE,nf_nat,xt_state,nf_nat_h323,nf_nat_ipv4,nf_nat_pptp,nf_nat_tftp,nf_conntrack_ftp,nf_conntrack_irc,nf_conntrack_sip,iptable_nat,nf_conntrack_h323,nf_conntrack_ipv4,nf_conntrack_pptp,nf_conntrack_tftp
ip_tables              17042  2 iptable_filter,iptable_nat
x_tables               18125  6 ip_tables,xt_tcpudp,ipt_MASQUERADE,xt_state,iptable_filter,ipt_REJECT
binfmt_misc            12814  1 
loop                   18078  0 
dm_crypt               17946  0 
uvcvideo               57529  0 
videobuf2_vmalloc      12593  1 uvcvideo
videobuf2_memops       12507  1 videobuf2_vmalloc
videobuf2_core         26281  1 uvcvideo
videodev               69477  2 uvcvideo,videobuf2_core
media                  13721  2 uvcvideo,videodev
rtl8187                31077  0 
eeprom_93cx6           12641  1 rtl8187
nvidia              10229064  33 
arc4                   12488  4 
snd_hda_codec_hdmi     30992  4 
joydev                 17054  0 
brcmsmac              425333  0 
cordic                 12337  1 brcmsmac
brcmutil               12721  1 brcmsmac
mac80211              287461  2 brcmsmac,rtl8187
snd_hda_codec_conexant    40633  1 
snd_hda_intel          26275  4 
snd_hda_codec          69260  3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
snd_hwdep              12940  1 snd_hda_codec
snd_pcm                57884  3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc         12911  2 snd_pcm,snd_hda_intel
ideapad_laptop         13238  0 
sparse_keymap          12681  1 ideapad_laptop
iTCO_wdt               12728  0 
snd_seq                39632  0 
snd_seq_device         13017  1 snd_seq
snd_timer              22249  2 snd_pcm,snd_seq
coretemp               12735  0 
kvm_intel             112520  0 
cfg80211              123887  3 brcmsmac,mac80211,rtl8187
iTCO_vendor_support    12633  1 iTCO_wdt
lpc_ich                16686  0 
rfkill                 18647  4 cfg80211,ideapad_laptop
mei                    31163  0 
mfd_core               12538  1 lpc_ich
snd                    42873  17 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_pcm,snd_seq,snd_hda_codec,snd_hda_intel,snd_seq_device
soundcore              12891  1 snd
acpi_cpufreq           13110  1 
evdev                  17298  10 
kvm                   259959  1 kvm_intel
i2c_i801               16910  0 
i2c_core               19250  3 i2c_i801,nvidia,videodev
psmouse                59567  0 
bcma                   28000  1 brcmsmac
serio_raw              12813  0 
mperf                  12422  1 acpi_cpufreq
processor              27777  1 acpi_cpufreq
video                  17463  0 
ac                     12553  0 
battery                12987  0 
button                 12825  0 
wmi                    13052  0 
ext4                  326976  2 
crc16                  12328  1 ext4
jbd2                   57854  1 ext4
mbcache                12939  1 ext4
dm_mod                 57470  1 dm_crypt
sg                     21649  0 
sd_mod                 35701  3 
sr_mod                 17507  0 
cdrom                  30505  1 sr_mod
crc_t10dif             12333  1 sd_mod
crc32c_intel           12660  0 
microcode              17845  0 
thermal                13138  0 
thermal_sys            17926  3 video,thermal,processor
ahci                   24929  2 
libahci                22455  1 ahci
ehci_hcd               39866  0 
libata                125948  2 ahci,libahci
scsi_mod              131063  4 sg,libata,sd_mod,sr_mod
usbcore               109555  4 uvcvideo,rtl8187,ehci_hcd,usbhid
usb_common             12339  1 usbcore
r8169                  47226  0 
mii                    12596  1 r8169

Code:

64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=1 ttl=52 time=60.3 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=2 ttl=52 time=60.0 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=3 ttl=52 time=61.1 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=4 ttl=52 time=60.3 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=5 ttl=52 time=154 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=6 ttl=52 time=61.4 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=7 ttl=52 time=129 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=8 ttl=52 time=61.2 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=9 ttl=52 time=60.5 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=10 ttl=52 time=60.3 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=13 ttl=52 time=63.1 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=14 ttl=52 time=120 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=15 ttl=52 time=60.2 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=16 ttl=52 time=61.8 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=17 ttl=52 time=61.1 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=18 ttl=52 time=80.4 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=19 ttl=52 time=60.0 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=20 ttl=52 time=60.1 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=21 ttl=52 time=61.6 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=23 ttl=52 time=135 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=24 ttl=52 time=82.8 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=25 ttl=52 time=73.0 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=26 ttl=52 time=63.7 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=27 ttl=52 time=61.1 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=28 ttl=52 time=74.0 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=29 ttl=52 time=64.8 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=30 ttl=52 time=62.0 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=31 ttl=52 time=62.4 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=32 ttl=52 time=107 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=33 ttl=52 time=59.8 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=34 ttl=52 time=77.2 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=35 ttl=52 time=60.5 ms
64 bytes from lhr14s23-in-f31.1e100.net (74.125.230.95): icmp_req=36 ttl=52 time=144 ms

What I notice is that every time I re-connect to the WLAN I have a normal browse behavior and after 3-4 page loads the problem starts...

Network encryption : WPA/TKIP

ondoho · 09-20-2014, 02:19 PM

the pings look pretty identical to me.
however, here i can see a clear difference:

Code:

chefarov@debian:~$ lsmod | grep rtl8187 ### problem machine
rtl8187                35473  0 
eeprom_93cx6           12497  1 rtl8187
mac80211              192806  1 rtl8187
cfg80211              137243  2 mac80211,rtl8187
usbcore               128741  6 ehci_hcd,uhci_hcd,usbhid,usb_storage,rtl8187

chefarov@redoctober:~$ lsmod | grep rtl8187 ### good machine
rtl8187                65271  0 
mac80211              658125  1 rtl8187
eeprom_93cx6           13344  1 rtl8187
cfg80211              502970  3 rtl8187,mac80211,wl

this from post #1: lsmod | grep rtl8187 ### (good or bad machine???)
rtl8187                59463  0 
eeprom_93cx6           12625  1 rtl8187
mac80211              464019  1 rtl8187
cfg80211              412187  2 mac80211,rtl8187
usbcore               158411  5 uhci_hcd,rtl8187,ehci_hcd,ehci_pci,usbhid

this should give you something to work with.

also you have different kernels on each machine.
also one is 64bit and one is 32bit.
also, could it be the wireless driver requires firmware?
you can check logs, or in fact post again what is recommended here:
http://crunchbang.org/forums/viewtopic.php?id=27628

but you really are going to have to do some searching with the results you get.

i usually build my web search phrases like this: "linux <device manufacturer or common name of device> <simplified error message>" sometimes it is also possible to enter error messages as search queries, but remove special characters .

chefarov · 09-21-2014, 07:53 AM

thanks for the link