Hm, also ich glaube nicht, dass es an NetworkManager liegt, da dasselbe Problem auch mit wicd und dem KDE Daemon fuer WiFi besteht (bzw. wicd bricht sofort nach Verbindung wieder ab).
Hier die dmesg (habe sie etwas geschnitten, damit nur der WLAN relevante teil darin vorkommt):
[ 3.114766] rtl8192cu: MAC address: e8:4e:06:22:ca:65
[ 3.114771] rtl8192cu: Board Type 0
[ 3.115013] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1
[ 3.115040] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
[ 3.127234] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140926/nsarguments-95)
[ 3.127274] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140926/nsarguments-95)
[ 3.127294] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140926/nsarguments-95)
[ 3.127313] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140926/nsarguments-95)
[ 3.127331] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140926/nsarguments-95)
[ 3.127350] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140926/nsarguments-95)
[ 3.127368] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140926/nsarguments-95)
[ 3.150671] input: HDA NVidia Headphone as /devices/pci0000:00/0000:00:08.0/sound/card0/input9
[ 3.175059] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[ 3.176273] usbcore: registered new interface driver rtl8192cu
[ 3.177564] rtl8192cu 1-1:1.0 wlp0s4f1u1: renamed from wlan0
[ 3.191475] applesmc: key=300 fan=1 temp=14 index=14 acc=1 lux=2 kbd=1
[ 3.205144] rtl8192cu: MAC auto ON okay!
[ 3.238664] rtl8192cu: Tx queue select: 0x05
[ 3.280087] input: applesmc as /devices/platform/applesmc.768/input/input10
[ 3.510760] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140926/nsarguments-95)
[ 3.533666] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140926/nsarguments-95)
[ 3.583587] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140926/nsarguments-95)
[ 3.653035] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140926/nsarguments-95)
[ 4.538131] wlp0s4f1u1: authenticate with 7c:4f:b5:df:9b:2b
[ 4.550725] wlp0s4f1u1: send auth to 7c:4f:b5:df:9b:2b (try 1/3)
[ 4.555041] wlp0s4f1u1: authenticated
[ 4.556728] wlp0s4f1u1: associate with 7c:4f:b5:df:9b:2b (try 1/3)
[ 4.587553] wlp0s4f1u1: RX AssocResp from 7c:4f:b5:df:9b:2b (capab=0x411 status=0 aid=3)
[ 4.590871] wlp0s4f1u1: associated
[ 5.261117] fuse init (API version 7.23)
[ 85.784211] wlp0s4f1u1: deauthenticating from 7c:4f:b5:df:9b:2b by local choice (Reason: 3=DEAUTH_LEAVING)
[ 85.801103] cfg80211: Calling CRDA to update world regulatory domain
[ 108.647031] wlp0s4f1u1: authenticate with 7c:4f:b5:df:9b:2b
[ 108.692625] wlp0s4f1u1: send auth to 7c:4f:b5:df:9b:2b (try 1/3)
[ 108.697807] wlp0s4f1u1: authenticated
[ 108.700177] wlp0s4f1u1: associate with 7c:4f:b5:df:9b:2b (try 1/3)
[ 108.704178] wlp0s4f1u1: RX AssocResp from 7c:4f:b5:df:9b:2b (capab=0x411 status=0 aid=3)
[ 108.704807] wlp0s4f1u1: associated
Kann mir jemand zusaetzich sagen, wass es mit dem ACPI Problem auf sich hat?
Sieht aus, als haette ich nicht alleine das Problem:
https://bbs.archlinux.org/viewtopic.php?id=147222
Aber eine Loesung wird angeboten..
Ich habe hier auch noch eine andere WLAN Karte rumliegen, aber diese wird leider gar nicht als WiFi Karte erkannt von Arch sondern als High Speed USB Device :/