Wifi - ztrata packetů

Zdravím,
po reinstalaci linuxu (debian x64 s KDE 4.6) mam jeden podstatny problem, ktery drive nebyval. Celkově wifi ztrácí více než polovinu paketů (viz priloha). Jedná se o:

WIFI:
02:00.0 Network controller: Intel Corporation WiFi Link 5100
AP:
wlan0     Scan completed :
          Cell 01 - Address: 00:26:5A:D1:E0:4E
                    Channel:10
                    Frequency:2.457 GHz (Channel 10)
                    Quality=68/70  Signal level=-42 dBm  
                    Encryption key:on
                    ESSID:"xdark.cz"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
                              36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000002823866180
                    Extra: Last beacon: 52ms ago
                    IE: Unknown: 0008786461726B2E637A
                    IE: Unknown: 010482848B96
                    IE: Unknown: 03010A
                    IE: Unknown: 2A0100
                    IE: Unknown: 32080C1218243048606C
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
                    IE: Unknown: 2D1A4E101BFFFF000000000000000000000000000000000000000000
                    IE: Unknown: 3D160A071B0000000F000000000000000000000000000000
                    IE: Unknown: DD1E00904C336E101BFFFF000000000000000000000000000000000000000000
                    IE: Unknown: DD1A00904C340A07030000000F000000000000000000000000000000
                    IE: Unknown: DD7F0050F204104A0001101044000102103B000103104700104578503BD0773CFD9CF536D58C1C2CB31021000E442D4C696E6B2053797374656D73102300074449522D363535102400024134104200046E6F6E651054000800060050F204000110110017587472656D65204E204749474142495420526F75746572100800020084

Předem děkuji za každé rady.

Signal mas vybornej: -42
Na kolik mas nastaveno pocitadlo opakovani?
Nezmenil se ti vysilaci vykon?

root@dvouramenna:~# iwconfig wlan0
wlan0     IEEE 802.11abg  ESSID:"dvrmn.heaven-czfree.net"
          Mode:Managed  Frequency:5.18 GHz  Access Point: 00:15:6D:D6:2A:9D
          Bit Rate=54 Mb/s   Tx-Power=2 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=57/70  Signal level=-53 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

A pak jeste zbyva, ze te nekdo skutecne zacal rusit.

Dotaz: Wifi - ztrata packetů

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