Public bug reported:
Using Intrepid Alpha 5 with an Atheros 5212/5213 (as identified by
Hardware Test / lspci) and connecting to a WPA 2 Personal wireless
network, the connection drops every 5-10 minutes, and when it is
connected, the connection is very slow (bitwise, typically 10-100x
slower than with Hardy). Often when reconnecting after dropping it will
ask for the WPA key again, which is already saved, and will work after
one or two times of just pressing Okay. The process ath5k_pci also
consumes around 40-85% CPU during the connection process and also
intermittently while the connection exists, making the computer unusable
during this time (mouse is not very responsive).
This card worked fine on Gutsy and Hardy and did not experience these
problems. This problem is easy to duplicate; I can boot into Hardy and
have fast and stable wireless, and then boot again into Intrepid and
have the experience described above on the same network. Note that I
don't know that this issue is restricted to WPA 2 Personal networks;
that is just my home network that I have to test.
Strangely enough this bug existed in Alpha 4, and I say strangely
because that was Linux 2.6.26 which should have been using a different
driver. Originally after doing a fresh install of Alpha 5, I didn't
notice this bug, but now after a restart it seems to be back. I wonder
if it is possible that it is using the wrong (old, restricted) driver,
somehow? I have attached a screenshot of the Hardware Drivers
application, which seems to display conflicting messages in the title
and body.
Please let me know what further information is necessary.
Intrepid Alpha 5
Linux: 2.6.27.2.2
lspci line: 02:02.0 Ethernet controller: Atheros Communications Inc.
AR5212/AR5213 Multiprotocol MAC/baseband processor (rev 01)
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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Wireless on Atheros 5212/5213 drops often, is slow, and ath5k_pci consumes
large amounts of CPU
https://bugs.launchpad.net/bugs/267761
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