ath9k/AR9285 - incompatibility with bluetooth
Hellow,
I have a ZOTAC MAG ION and I'm having problems with wireless
connections
Distribution: Ubuntu 9.10
Kernel version: 2.6.31-16
Device: 04:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
Problem Description:
- Low signal strength
- Cannot connect to wireless networks
Using linux-backports-modules-karmic:
- Low signal strength persists
- Can connect to WPA networks but signal strengh is low and unstable, also when using at the same time a Bluetooth USB dongle (continuously inquiring) the wireless connection is lost.
- Cannot connect to WEP networks, although the WEP key is set correctly and the device is associated to the AP
Using latest linux-wireless snapshot (20100113):
- Can connect to WEP networks but when I use at the same time a Bluetooth USB dongle (continuously inquiring) the speed of the wireless connection becomes very slow.
- Can connect to WPA networks but when I use at the same time a Bluetooth USB dongle (continuously inquiring) the wireless connection is lost.
If you need more info, please do not hesitate to inquire. Thanks in advance,
Signature · 2 lines
Alberto José Rodríguez Rodríguez <[email protected]> BluLabs, S.L.
Quoted 4 lines · Alberto José Rodríguez Rodríguez
Hellow,
I have a ZOTAC MAG ION and I'm having problems with wireless
connections
Quoted 13 lines
Distribution: Ubuntu 9.10
Kernel version: 2.6.31-16
Device: 04:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
Problem Description:
- Low signal strength
- Cannot connect to wireless networks
Using linux-backports-modules-karmic:
- Low signal strength persists
- Can connect to WPA networks but signal strengh is low and unstable, also when using at the same time a Bluetooth USB dongle (continuously inquiring) the wireless connection is lost.
- Cannot connect to WEP networks, although the WEP key is set correctly and the device is associated to the AP
Using latest linux-wireless snapshot (20100113):
- Can connect to WEP networks but when I use at the same time a Bluetooth USB dongle (continuously inquiring) the speed of the wireless connection becomes very slow.
- Can connect to WPA networks but when I use at the same time a Bluetooth USB dongle (continuously inquiring) the wireless connection is lost.
This isn't unexpected; Bluetooth and WiFi interfere with each other because they both use 2.4GHz. So don't expect great performance out of either BT or WiFi when you're using both at the same time. Many built-in chips have BT co-existence capability, but that only works if both the WiFi and BT chips are built into your computer and are wired up to talk to each other. External USB BT or WiFi dongles almost certainly will not have working coexistence support.
Dan
2010/1/14 Dan Williams <[email protected]>:
Quoted 20 lines
Quoted 4 lines · Alberto José Rodríguez Rodríguez
Hellow,
I have a ZOTAC MAG ION and I'm having problems with wireless connectionsQuoted 13 lines
Distribution: Ubuntu 9.10
Kernel version: 2.6.31-16
Device: 04:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
Problem Description:
- Low signal strength
- Cannot connect to wireless networks
Using linux-backports-modules-karmic:
- Low signal strength persists
- Can connect to WPA networks but signal strengh is low and unstable, also when using at the same time a Bluetooth USB dongle (continuously inquiring) the wireless connection is lost.
- Cannot connect to WEP networks, although the WEP key is set correctly and the device is associated to the AP
Using latest linux-wireless snapshot (20100113):
- Can connect to WEP networks but when I use at the same time a Bluetooth USB dongle (continuously inquiring) the speed of the wireless connection becomes very slow.
- Can connect to WPA networks but when I use at the same time a Bluetooth USB dongle (continuously inquiring) the wireless connection is lost.
Quoted 7 lines
This isn't unexpected; Bluetooth and WiFi interfere with each other because they both use 2.4GHz. So don't expect great performance out of either BT or WiFi when you're using both at the same time. Many built-in chips have BT co-existence capability, but that only works if both the WiFi and BT chips are built into your computer and are wired up to talk to each other. External USB BT or WiFi dongles almost certainly will not have working coexistence support.
We have also spoke about writing some generic bluetooth coexistance by using a frequency broker [1] and submitting for example some commands to the bluetooth device to not operate on the channel the 802.11 is on but this would be an enhancement and something which remains to be implemented.
[1] http://wireless.kernel.org/en/developers/FrequencyBroker
Luis
Thanks for your response. I made this question because while this device loses the connection, on my laptop, with the same bluetooth device, the connection is not affected.
03:00.0 Network controller: Intel Corporation Wireless WiFi Link 5100
Quoted 31 lines · Dan Williams
Quoted 4 lines · Alberto José Rodríguez Rodríguez
Hellow,
I have a ZOTAC MAG ION and I'm having problems with wireless
connectionsQuoted 13 lines
Distribution: Ubuntu 9.10
Kernel version: 2.6.31-16
Device: 04:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
Problem Description:
- Low signal strength
- Cannot connect to wireless networks
Using linux-backports-modules-karmic:
- Low signal strength persists
- Can connect to WPA networks but signal strengh is low and unstable, also when using at the same time a Bluetooth USB dongle (continuously inquiring) the wireless connection is lost.
- Cannot connect to WEP networks, although the WEP key is set correctly and the device is associated to the AP
Using latest linux-wireless snapshot (20100113):
- Can connect to WEP networks but when I use at the same time a Bluetooth USB dongle (continuously inquiring) the speed of the wireless connection becomes very slow.
- Can connect to WPA networks but when I use at the same time a Bluetooth USB dongle (continuously inquiring) the wireless connection is lost.This isn't unexpected; Bluetooth and WiFi interfere with each other because they both use 2.4GHz. So don't expect great performance out of either BT or WiFi when you're using both at the same time. Many built-in chips have BT co-existence capability, but that only works if both the WiFi and BT chips are built into your computer and are wired up to talk to each other. External USB BT or WiFi dongles almost certainly will not have working coexistence support.
Dan
Signature · 2 lines
Alberto José Rodríguez Rodríguez <[email protected]> BluLabs, S.L.
Quoted 7 lines · Alberto José Rodríguez Rodríguez
Thanks for your response. I made this question because while this device loses the connection, on my laptop, with the same bluetooth device, the connection is not affected.
03:00.0 Network controller: Intel Corporation Wireless WiFi Link 5100
Hello Alberto,
I do not think your wlan problem is (only) because of Bluetooth interfering with Wlan.
I have a Zotac Mag (with an Ath9k, and looks like the current implementation of the drivers are pretty bad. I am having the same issues (very low signal, very low speed and iregular connections). I do not have any bluetooth dongle.
After reading a lot, looks like kernel 6.2.32 improves it (comes with Ubuntu Lucid Linx in April), as well as backports.
For me, backports have not improved it much, but the kernel 6.2.32 yes. Speed is still lower than expected, signal also, but the reliability of the connection is improved.
What I have done is use ndiswrapper with the drivers for XP which are to be found on the Zotac website.
I hope this helped.
Un saludo,
Juanma.
MY WLAN ADAPTER: 04:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
Quoted 10 lines · Dan Williams
Quoted 9 lines
Quoted 7 lines · Alberto José Rodríguez Rodríguez
Hellow,
I have a ZOTAC MAG ION and I'm having problems with wireless
connectionsDistribution: Ubuntu 9.10
Kernel version: 2.6.31-16
Device: 04:00.0 Network controller: Atheros Communications Inc. AR9285
Wireless Network Adapter
Quoted 7 lines
(PCI-Express) (rev 01)
Quoted 6 lines
Quoted 6 lines
Problem Description:
- Low signal strength
- Cannot connect to wireless networks
Using linux-backports-modules-karmic:
- Low signal strength persists
- Can connect to WPA networks but signal strengh is low and unstable,
also when using at the same time a
Quoted 2 lines
Bluetooth USB dongle (continuously inquiring) the wireless connection is lost.
Quoted 1 line
Quoted 1 line
- Cannot connect to WEP networks, although the WEP key is set
correctly and the device is associated to the AP
Quoted 2 lines
Quoted 2 lines
Quoted 2 lines
Using latest linux-wireless snapshot (20100113):
- Can connect to WEP networks but when I use at the same time a
Bluetooth USB dongle (continuously
Quoted 2 lines
inquiring) the speed of the wireless connection becomes very slow.
Quoted 1 line
Quoted 1 line
- Can connect to WPA networks but when I use at the same time a
Bluetooth USB dongle (continuously
Quoted 13 lines
inquiring) the wireless connection is lost.
Quoted 12 lines
This isn't unexpected; Bluetooth and WiFi interfere with each other because they both use 2.4GHz. So don't expect great performance out of either BT or WiFi when you're using both at the same time. Many built-in chips have BT co-existence capability, but that only works if both the WiFi and BT chips are built into your computer and are wired up to talk to each other. External USB BT or WiFi dongles almost certainly will not have working coexistence support.
Dan