Help > Laptop Hardware
Intel Centrino Wireless-N 1000 disconnect randomly
barakatax:
Dear All,
I am having Intel Centrino Wireless N 1000 on my laptop.
The connection signal strength is quite good, more than 50%.
Sometimes the connection died unexpectedly and quite difficult to get it back.
The kernel I'm using : 2.6.38.8-pclos3.pae.bfs, KDE desktop.
Is there any way how to keep this connection steady?
Thank you for your time answering this question.
Here is lsmod output:
--- Code: ---lsmod
Module Size Used by
snd_usb_audio 70727 0
snd_usbmidi_lib 15440 1 snd_usb_audio
snd_rawmidi 15287 1 snd_usbmidi_lib
af_packet 17417 2
ipv6 266625 0
rfcomm 30279 8
snd_hda_codec_hdmi 20480 1
sco 7499 2
snd_hda_codec_idt 48341 1
bnep 8483 2
snd_hda_intel 19173 2
snd_hda_codec 66310 3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
snd_hwdep 4820 2 snd_usb_audio,snd_hda_codec
l2cap 39423 16 rfcomm,bnep
snd_seq_dummy 1135 0
snd_seq_oss 25264 0
arc4 1126 2
ecb 1645 2
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
iwlagn 171869 0
snd_pcm_oss 33854 0
btusb 9865 2
bluetooth 51698 9 rfcomm,sco,bnep,l2cap,btusb
snd_pcm 60702 5 snd_usb_audio,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_pcm_oss
snd_timer 15383 2 snd_seq,snd_pcm
snd_mixer_oss 12981 1 snd_pcm_oss
iwlcore 52749 1 iwlagn
mac80211 189461 2 iwlagn,iwlcore
snd 43189 19 snd_usb_audio,snd_usbmidi_lib,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_codec_idt,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
sg 23578 0
uvcvideo 55371 0
i2c_i801 7002 0
r8169 34757 0
soundcore 5025 1 snd
cfg80211 126787 3 iwlagn,iwlcore,mac80211
snd_page_alloc 6037 2 snd_hda_intel,snd_pcm
iTCO_wdt 9209 0
mii 3382 1 r8169
videodev 56533 1 uvcvideo
sr_mod 13510 0
cdrom 31506 1 sr_mod
iTCO_vendor_support 1585 1 iTCO_wdt
binfmt_misc 5850 1
nvidia 10738613 43
cpufreq_ondemand 7592 2
cpufreq_conservative 7612 0
cpufreq_powersave 714 0
acpi_cpufreq 5117 0
freq_table 2087 2 cpufreq_ondemand,acpi_cpufreq
mperf 1003 1 acpi_cpufreq
nvram 4805 0
firewire_ohci 25713 0
firewire_sbp2 11797 0
firewire_core 43104 2 firewire_ohci,firewire_sbp2
crc_itu_t 1103 1 firewire_core
fuse 59487 5
dm_mod 58938 0
i2c_core 16436 3 i2c_i801,videodev,nvidia
ir_lirc_codec 3703 0
hp_wmi 4717 0
lirc_dev 7963 1 ir_lirc_codec
ir_sony_decoder 1847 0
ir_jvc_decoder 1941 0
sparse_keymap 2484 1 hp_wmi
ir_rc6_decoder 2293 0
rfkill 12694 5 bluetooth,cfg80211,hp_wmi
hp_accel 12828 0
lis3lv02d 8721 1 hp_accel
wmi 7463 1 hp_wmi
rc_rc6_mce 1144 0
ir_rc5_decoder 1813 0
joydev 7663 0
ir_nec_decoder 2229 0
ene_ir 13377 0
rc_core 13095 9 ir_lirc_codec,ir_sony_decoder,ir_jvc_decoder,ir_rc6_decoder,rc_rc6_mce,ir_rc5_decoder,ir_nec_decoder,ene_ir
video 10008 0
processor 22399 3 acpi_cpufreq
input_polldev 2478 1 lis3lv02d
fan 1910 0
evdev 7275 19
thermal 6670 0
ac 2513 0
battery 8843 0
button 4021 0
ata_piix 18666 0
ahci 17997 5
libahci 16227 1 ahci
libata 154847 3 ata_piix,ahci,libahci
sd_mod 31650 6
scsi_mod 150584 5 sg,sr_mod,firewire_sbp2,libata,sd_mod
crc_t10dif 1104 1 sd_mod
ext4 312233 1
jbd2 59991 1 ext4
crc16 1099 2 l2cap,ext4
uhci_hcd 19595 0
ohci_hcd 19854 0
ehci_hcd 36111 0
usbhid 31331 0
hid 63565 1 usbhid
usbcore 118087 9 snd_usb_audio,snd_usbmidi_lib,btusb,uvcvideo,uhci_hcd,ohci_hcd,ehci_hcd,usbhid
--- End code ---
Output lspci for Centrino 1000 :
--- Code: ---03:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000
--- End code ---
Output lspci -v -s 03:00.0
--- Code: ---03:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000
Subsystem: Intel Corporation Centrino Wireless-N 1000 BGN
Flags: bus master, fast devsel, latency 0, IRQ 47
Memory at d9000000 (64-bit, non-prefetchable) [size=8K]
Capabilities: [c8] Power Management version 3
Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [e0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number 00-1e-64-ff-ff-5f-7e-ae
Kernel driver in use: iwlagn
Kernel modules: iwlagn
--- End code ---
Checked the Synaptic, installed Centrino 1000 wireless driver version is 128.50.3.1-1pclos2010.
At this website : http://www.intellinuxwireless.org/?n=downloads&f=ucodes_1000, newest version of Centrino 1000 driver is available which released in 04-04-2011.
While version 128.50.3.1 released in 08-14-09.
Just compare the date only, I don't know whether newest driver will solve my problem or not.
If I use the newest driver from that website, I don't know how to install it and I am afraid it will break my system.
So I am hoping someone could figure out what to do.
Regards,
barakatax
AS:
--- Quote from: barakatax on February 05, 2012, 04:48:12 AM ---Dear All,
I am having Intel Centrino Wireless N 1000 on my laptop.
The connection signal strength is quite good, more than 50%.
Sometimes the connection died unexpectedly ...
--- End quote ---
Hi barakatax,
when your connection dies, try to look at the end of /var/log/messages and /var/log/syslog for possible hints
about the cause ...
--- Quote ---... and quite difficult to get it back.
--- End quote ---
Please expand, "quite difficult" or "never get back" ?
Eventually, what you have done to resume the connection ?
Your wireless router actually support the mode 802.11 N ?
AS
barakatax:
Hi AS,
Thank you very much for your reply.
Answering to your questions, here are the outputs :
/var/log/messages
--- Code: ---...
Feb 6 19:35:53 localhost klogd: cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Feb 6 19:35:53 localhost klogd: cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
Feb 6 19:35:53 localhost ifplugd(wlan0)[12920]: Link beat lost.
Feb 6 19:35:59 localhost ifplugd(wlan0)[12920]: Executing '/etc/ifplugd/ifplugd.action wlan0 down'.
Feb 6 19:35:59 localhost avahi-daemon[3245]: Withdrawing address record for 192.168.1.9 on wlan0.
Feb 6 19:35:59 localhost avahi-daemon[3245]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.1.9.
Feb 6 19:35:59 localhost avahi-daemon[3245]: Interface wlan0.IPv4 no longer relevant for mDNS.
Feb 6 19:35:59 localhost ifplugd(wlan0)[12920]: Program executed successfully.
Feb 6 19:37:01 localhost anacron[3659]: Job `cron.weekly' started
Feb 6 19:37:01 localhost anacron[3659]: Job `cron.weekly' terminated
--- End code ---
/var/log/syslog
--- Code: ---....
Feb 6 19:35:53 localhost klogd: cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Feb 6 19:35:53 localhost klogd: cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
Feb 6 19:35:53 localhost ifplugd(wlan0)[12920]: Link beat lost.
Feb 6 19:35:59 localhost ifplugd(wlan0)[12920]: Executing '/etc/ifplugd/ifplugd.action wlan0 down'.
Feb 6 19:35:59 localhost avahi-daemon[3245]: Withdrawing address record for 192.168.1.9 on wlan0.
Feb 6 19:35:59 localhost avahi-daemon[3245]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.1.9.
Feb 6 19:35:59 localhost avahi-daemon[3245]: Interface wlan0.IPv4 no longer relevant for mDNS.
Feb 6 19:35:59 localhost ifplugd(wlan0)[12920]: Program executed successfully.
Feb 6 19:37:01 localhost anacron[3659]: Job `cron.weekly' started
Feb 6 19:37:01 localhost anacron[3659]: Job `cron.weekly' terminated
--- End code ---
What I meant with "quite difficult to get connection back" is I can get the connection back after 3 or 4 times clicks the CONNECT icon on the left bottom Network Center window. If the first try failed, then I try to connect it again until I have my connection.
That is what I usually do to resume my connection.
I don't have any idea whether the router support mode 802.11 N or not. Now I am staying in one small apartement room in Singapore. I am staying here sharing with the owner, not fully rent the whole apartement.The owner give me internet connection for free. And the router is in his room.
For your info, while I was writing this post, connection has died twice.
Thank you AS for helping me.
Regards,
barakatax
AS:
--- Quote from: barakatax on February 06, 2012, 05:22:44 AM ---Hi AS,
Thank you very much for your reply.
Answering to your questions, here are the outputs :
/var/log/messages
--- Quote ---...
Feb 6 19:35:53 localhost klogd: cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Feb 6 19:35:53 localhost klogd: cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 6 19:35:53 localhost klogd: cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
Feb 6 19:35:53 localhost ifplugd(wlan0)[12920]: Link beat lost.
Feb 6 19:35:59 localhost ifplugd(wlan0)[12920]: Executing '/etc/ifplugd/ifplugd.action wlan0 down'.
Feb 6 19:35:59 localhost avahi-daemon[3245]: Withdrawing address record for 192.168.1.9 on wlan0.
Feb 6 19:35:59 localhost avahi-daemon[3245]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.1.9.
Feb 6 19:35:59 localhost avahi-daemon[3245]: Interface wlan0.IPv4 no longer relevant for mDNS.
Feb 6 19:35:59 localhost ifplugd(wlan0)[12920]: Program executed successfully.
Feb 6 19:37:01 localhost anacron[3659]: Job `cron.weekly' started
Feb 6 19:37:01 localhost anacron[3659]: Job `cron.weekly' terminated
--- End quote ---
--- End quote ---
Link beat lost ... this is your issue ...
--- Quote ---What I meant with "quite difficult to get connection back" is I can get the connection back after 3 or 4 times clicks the CONNECT icon on the left bottom Network Center window. If the first try failed, then I try to connect it again until I have my connection.
That is what I usually do to resume my connection.
I don't have any idea whether the router support mode 802.11 N or not. Now I am staying in one small apartement room in Singapore. I am staying here sharing with the owner, not fully rent the whole apartement.The owner give me internet connection for free. And the router is in his room.
--- End quote ---
The overall look like some instability of your adapter ... I would try to disable the N functionality, therefore forcing your adapter to work on 802.11G:
can be done adding the following line in /etc/modprobe.conf
--- Code: ---options iwlagn 11n_disable=1
--- End code ---
when done, reboot you system.
Another possibility could be something around adapter power management, we will see after this first trial ;)
Please report back the output of the command:
--- Code: ---iwconfig wlan0
--- End code ---
AS
barakatax:
Thanks for the solution so far, AS.
Disabled the N functionality, then here are the iwconfig wlan0 results:
--- Code: ---
[barakatax@localhost ~]$ iwconfig wlan0
wlan0 IEEE 802.11bg ESSID:"SINGTEL-0120"
Mode:Managed Frequency:2.412 GHz Access Point: B0:E7:54:52:95:C1
Bit Rate=11 Mb/s Tx-Power=14 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=35/70 Signal level=-75 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:119 Missed beacon:0
[barakatax@localhost ~]$ iwconfig wlan0
wlan0 IEEE 802.11bg ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=14 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
[barakatax@localhost ~]$ iwconfig wlan0
wlan0 IEEE 802.11bg ESSID:"SINGTEL-0120"
Mode:Managed Frequency:2.412 GHz Access Point: B0:E7:54:52:95:C1
Bit Rate=2 Mb/s Tx-Power=14 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=31/70 Signal level=-79 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:19 Missed beacon:0
--- End code ---
You can see above, after restarting the laptop, connection up. Then about 10 minutes later, it dropped. I tried to reconnect and it up again.
I do really hope to have a steady connection. Do I need additional hardware, let's say another router in my room?
May be as signal booster ???
Regards,
barakatax
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