Comment 56 for bug 407040

I have the same problem: Acer 4810TZ:
 02:00.0 Network controller: Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-Express) (rev 01)

In dmesg, I can see:
Oct 10 08:43:26 gustavo-laptop kernel: [ 166.524219] ath9k: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x40000020
Oct 10 08:44:26 gustavo-laptop wpa_supplicant[1190]: CTRL-EVENT-SCAN-RESULTS

Normaly, the problem apper after open transmission software, and download some file in same time, maybe just a coincidence :-)