Camaleón wrote:
On Fri, 09 Mar 2012 11:08:31 +0100, Bernard wrote:
Bernard wrote:
Hi to Everyone,
On the Desktop of my association, there was no wireless card. So, I
purchased one that is said to be Debian compatible. It is a PCI card
TP-LINK
TL-WN751ND
It is supposedly based on an Atheros chipset AR 9227
I plugged it inside the Central Unit on a PCI slot, and then booted the
Debian Squeeze system.
(...)
P.S. : I carried new tests. As said above, now that my WiFi is
configured, every attempt to boot, leads to "freezing" of the system in
the middle of gnome start... EXCEPT IF I shutdown my DSL/WiFi box ! As
long as no connexion is possible, the system starts all right ; I can
see the other WiFi available in the area (I don't have the
passwords...). This being said, if I reboot my WiFi connexion on the DSL
modem, then, as said before, connexion does happen all right, it seems
fully operational, but only for about 45 to 60 seconds, system freezing
happens next. My TL-WN751ND card is supposed to work with Debian kernel
module ath9k, which is supposed to be loaded with the wireless-tools
package, which is alreeady installed.
There are many issues reported for system freezes regarding that kernel
module (ath9k), there is even a documented bug at the Linuxwireless site:
http://linuxwireless.org/en/users/Drivers/ath9k/bugs#Hangs_with_PCI_devices_and_SMP_systems
And even on Debian BTS:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=611946
I would try with an updated kernel.
Greetings,
Thanks for this information. I might end up updating the kernel, but at
this stage I am still trying to understand what happens and if there is
another way to go around. I also have an ASUS laptop on which I
installed Debian Squeeze on a dual boot together with MSWIN XP. This
laptop allows a wireless connexion, even though nothing was installed
other than what already existed on "MSWIN-XP". Wireless connexions are
fully operational, even though they are often active for hours. I
searched about the chipset used. It appeared to be the same as on the
Desktop !
lspci on the laptop (the one that works fine) says :
Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-express
rev 01
(while on the Desktop where no wireless connexion can operate for any
longer than one or two minutes without system freeze, this is a AR9287
Wireless Network Adapter, TP-LINK TL-WN751ND)
As stated, both machines are on Squeeze. On the laptop where everything
works fine, kernel is 2.6.32-5-686 (Debian 2.6.32.30), while it is
Debian 2.6.32-41 on the problematic Desktop.
I carried a few more tests on the problematic Desktop. I tested 'Wicd'
instead of 'NetworkManager'. Even though I had uninstalled (#apt-get
remove --purge) the old Wicd package and re-installed a new one , it did
reckognise my WiFi, but I couldn't get any connexion: the password did
not seem to be accepted ; it said "wrong password". True enough, this is
a "pasphrase", not a key, that was required, and I had nothing else than
a WPA-PSK key, the very same one that was being reckognized by NM. I
tested several times to no avail.
I am willing to test 'ifup', but I don't know what I should write in my
/etc/network/interfaces file. I carried a few tests, to no avail.
I also tested another chip that I have purchased in the same time. It is
a "mini-PCI" wireless card (TP-LINK model TL-WN861N). I had to purchase
a special "mini-pci to pci adaptator" in order to be able to insert it
in a PCI slot in said Desktop. This one is not being reckognized "out of
the box" as the TL-WN751ND was. You must install 'firmware-atheros'
before it gets acknowledged. This one is supposedly driven by AR922X
wireless-network-adapter. But I got nowhere with this. #iwconfig said
that it was on wlan1, but I could never even see any wireless network
with it. I also tested it on MSWIN, where it seemed reckognized all
write after proper installation with appropriate drivers... but in the
end I never got any connexion ; it seems to be that my DSL box wifi
signal was too weak for this chipset... The other chipset, the one that
connects OK to Debian for a short time before system freeze, works
perfectly under MSWIN.
So, I wonder why an atheros wifi card works so well on a laptop with
Squeeze, and another very closely related Atheros chipset refuses to
work on another machine on Squeeze.
If I were to upgrade kernels, which kernel would you recommend ?
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