Dotaz: wifi na D820 s novym kernelem

[Mirekh]

Zdravim,

na notebooku Dell Latitude 820 mam FC8 se zprovoznenou wifi- funguje.

Mel bych dotaz ohledne instalace noveho kernelu. Nyni nb bezi ne kernelu 2.6.24.7-92.fc8.

Jiz delsi dobu pozoruji, ze kdyz si v ramci yum update nainstaluji novejsi kernel, pak uroven wifi signalu je nizsi (pri stejnych podminkach) nez u vyse uvedene verze kernelu a to pomerne dost vyrazne, ze se spojeni rozpadne podstatne drive.

Napriklad dnes jsem nainstaloval pres yum kernel 2.6.25.14-69.fc8 a stejny vysledek.

Pridavam informativne prenosove parametry jak je detekuje system:

stary - novy kernel

kvalita linky 40% - 50%

sila signalu 46% - 75%

uroven sumu 35% - 55%

Nejde jenom o cisla, opravdu wifi komnunikace s novym kernelem je o dost horsi. Zajim me, jestli se toto da nejak resit, rad bych samozrejme pouzival novejsi kernel.

Odpovědi

[Kozzi]

No o jakou kartu jde, jake ovladace pouzivas, co treba dopsat vypisi iwconfig z obou jader? Potom budem vedet mozna vice. Ja typuji ze se u ovladace zmenili nejake defaultni hodnoty. Treba vystupni vykon a podobne.

[Mirekh]

starsi kernel:

wlan0     IEEE 802.11  ESSID:"ISP-12"
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:13:D4:3F:D8:83
          Bit Rate=11 Mb/s   Tx-Power=15 dBm
          Retry min limit:7   RTS thr:off   Fragment thr=2352 B
          Encryption key:CEA7-96A4-67FA-9293-9A40-1222-D03F-F5DC-F681-9B44-7153-D471-8E02-2BB4-7336-C0D0 [2]
          Link Quality=45/100  Signal level=-82 dBm  Noise level=-97 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0



0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
        Subsystem: Intel Corporation Unknown device 1021
        Flags: bus master, fast devsel, latency 0, IRQ 218
        Memory at ecfff000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [c8] Power Management version 2
        Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable+
        Capabilities: [e0] Express Legacy Endpoint, MSI 00
        Kernel driver in use: iwl3945
        Kernel modules: iwl3945

novy kernel:

wlan0     IEEE 802.11abg  ESSID:"ISP-12"
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:13:D4:3F:D8:83
          Bit Rate=24 Mb/s   Tx-Power=15 dBm
          Retry min limit:7   RTS thr:off   Fragment thr=2352 B
          Encryption key:CEA7-96A4-67FA-9293-9A40-1222-D03F-F5DC-F681-9B44-7153-D471-8E02-2BB4-7336-C0D0 [2]   Security mode:open
          Power Management:off
          Link Quality=45/100  Signal level:-82 dBm  Noise level=-127 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0



0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
        Subsystem: Intel Corporation Unknown device 1021
        Flags: bus master, fast devsel, latency 0, IRQ 17
        Memory at ecfff000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [c8] Power Management version 2
        Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
        Capabilities: [e0] Express Legacy Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting 
        Capabilities: [140] Device Serial Number 05-73-9c-ff-ff-02-13-00
        Kernel driver in use: iwl3945
        Kernel modules: iwl3945

mas pravdu, ze je zde rozdil napr. v Power Management:off

zda se to nejak resit ?

[BigWrigley]

Co nejake parametry pri zavadeni modulu?

[Mirekh]

To nevim jak zjistim...

pls help

[BigWrigley]

modinfo iwl3945

[Mirekh]

zadny rozdil ...

stary-kernel

filename:       /lib/modules/2.6.24.7-92.fc8/kernel/drivers/net/wireless/iwlwifi/iwl3945.ko
license:        GPL
author:         Copyright(c) 2003-2008 Intel Corporation
version:        1.2.26kds
description:    Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux
srcversion:     36428B750C283831D718AB8
alias:          pci:v00008086d00004227sv*sd*bc*sc*i*
alias:          pci:v00008086d00004222sv*sd*bc*sc*i*
alias:          pci:v00008086d00004227sv*sd00001014bc*sc*i*
alias:          pci:v00008086d00004222sv*sd00001044bc*sc*i*
alias:          pci:v00008086d00004222sv*sd00001034bc*sc*i*
alias:          pci:v00008086d00004222sv*sd00001005bc*sc*i*
depends:        mac80211,cfg80211
vermagic:       2.6.24.7-92.fc8 SMP mod_unload 686 4KSTACKS
parm:           antenna:select antenna (1=Main, 2=Aux, default 0 [both]) (int)
parm:           disable:manually disable the radio (default 0 [radio on]) (int)
parm:           hwcrypto:using hardware crypto engine (default 0 [software])
 (int)
parm:           debug:debug output mask (int)
parm:           disable_hw_scan:disable hardware scanning (default 0) (int)
parm:           queues_num:number of hw queues. (int)
parm:           qos_enable:enable all QoS functionality (int)

novy kernel

filename:       /lib/modules/2.6.25.14-69.fc8/kernel/drivers/net/wireless/iwlwifi/iwl3945.ko
license:        GPL
author:         Copyright(c) 2003-2008 Intel Corporation
version:        1.2.26kds
description:    Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux
srcversion:     EF34FC0A0BF02BAA0BB0839
alias:          pci:v00008086d00004227sv*sd*bc*sc*i*
alias:          pci:v00008086d00004222sv*sd*bc*sc*i*
alias:          pci:v00008086d00004227sv*sd00001014bc*sc*i*
alias:          pci:v00008086d00004222sv*sd00001044bc*sc*i*
alias:          pci:v00008086d00004222sv*sd00001034bc*sc*i*
alias:          pci:v00008086d00004222sv*sd00001005bc*sc*i*
depends:        mac80211,cfg80211,rfkill
vermagic:       2.6.25.14-69.fc8 SMP mod_unload 686 4KSTACKS
parm:           antenna:select antenna (1=Main, 2=Aux, default 0 [both]) (int)
parm:           disable:manually disable the radio (default 0 [radio on]) (int)
parm:           hwcrypto:using hardware crypto engine (default 0 [software])
 (int)
parm:           debug:debug output mask (int)
parm:           disable_hw_scan:disable hardware scanning (default 0) (int)
parm:           queues_num:number of hw queues. (int)
parm:           qos_enable:enable all QoS functionality (int)