connection loss with rtl8192cu and linux kernel 3.10

[Lukas Böhm]

Hi,

As my first tries failed, I am sending this message again...
I have some trouble with hostapd (v2.2) on my embedded board with a Freescale
iMX6 Controller.
Linux Kernel is 3.10 and my Wifi USB Dongle uses the Realtek 8192CU chip.
Firmware and Module are already part of the kernel.
I can start the AP and connect to it but after a few seconds (10-20 secs) my
client will be logged off and has to log in again.
I found out that the more traffic is on this connection the longer it is hold up.
I don't know where the problem is, so I made a log file which is at
http://pastebin.com/QiVBDd0u

My hostapd.conf looks as follows:
##### hostapd configuration file ##############################################
interface=wlan0

logger_syslog=-1
logger_syslog_level=2
logger_stdout=-1
logger_stdout_level=2

ctrl_interface=/var/run/hostapd
ctrl_interface_group=0

ssid=test

hw_mode=g
channel=10
beacon_int=100
dtim_period=2
max_num_sta=10
rts_threshold=2347
fragm_threshold=2346
macaddr_acl=0
auth_algs=3
ignore_broadcast_ssid=0

wmm_enabled=0
wmm_ac_bk_cwmin=4
wmm_ac_bk_cwmax=10
wmm_ac_bk_aifs=7
wmm_ac_bk_txop_limit=0
wmm_ac_bk_acm=0
wmm_ac_be_aifs=3
wmm_ac_be_cwmin=4
wmm_ac_be_cwmax=10
wmm_ac_be_txop_limit=0
wmm_ac_be_acm=0
wmm_ac_vi_aifs=2
wmm_ac_vi_cwmin=3
wmm_ac_vi_cwmax=4
wmm_ac_vi_txop_limit=94
wmm_ac_vi_acm=0
wmm_ac_vo_aifs=2
wmm_ac_vo_cwmin=2
wmm_ac_vo_cwmax=3
wmm_ac_vo_txop_limit=47
wmm_ac_vo_acm=0
ap_max_inactivity=300
disassoc_low_ack=0

ieee80211n=1

eap_server=0
own_ip_addr=127.0.0.1

wpa=2
wpa_passphrase=password
wpa_pairwise=TKIP CCMP
rsn_pairwise=CCMP

-- 
Thanks in advance for any hints
Lukas