10.04 无线网No probe response from x after 500ms, disconnecting

[雪域原]

Ubuntu server　无线网每隔几个小时就会断掉，日志是
ath5k phy0: failed to warm reset the MAC Chip
ath5k phy0: can't reset hardware (-5)
ath5k phy0: noise floor calibration failed (2452MHz)
No probe response from AP 00:1d:0f:36:2b:a8 after 500ms, disconnecting.

请问是哪里的问题呢，装了wicd，没有改变。

[雪域原]

有人知道吗