I couldn't get my intel N6300 wireless card to work in AP mode.
$lspci|grep 6300
03:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35)
It is uploading the latest firmware as below, but when I do "iw list", it doesn't show AP mode in list of modes supported. I crosschecked with the intel linux drivers website and the firmware is latest. I am running Ubuntu 14.04
[ 1131.230320] iwlwifi 0000:03:00.0: irq 47 for MSI/MSI-X
[ 1131.248261] iwlwifi 0000:03:00.0: Direct firmware load failed with error -2
[ 1131.248272] iwlwifi 0000:03:00.0: Falling back to user helper
[ 1131.249113] iwlwifi 0000:03:00.0: Direct firmware load failed with error -2
[ 1131.249117] iwlwifi 0000:03:00.0: Falling back to user helper
[ 1131.267741] iwlwifi 0000:03:00.0: loaded firmware version 9.221.4.1 build 25532 op_mode iwldvm
Tried ndiswrapper, and got the below error, which as per googling found couldn't be resolved at all.
[ 357.174737] ndiswrapper version 1.59 loaded (smp=yes, preempt=no)
[ 357.191707] ndiswrapper (import:232): unknown symbol: ntoskrnl.exe:'MmGetSystemRoutineAddress'
[ 357.191720] ndiswrapper (import:232): unknown symbol: ntoskrnl.exe:'IoWMIWriteEvent'
[ 357.191745] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMFreePort'
[ 357.191752] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMSetMiniportAttributes'
[ 357.191761] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMIndicateStatusEx'
[ 357.191769] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMDeregisterMiniportDriver'
[ 357.191789] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMRegisterMiniportDriver'
[ 357.191801] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMOidRequestComplete'
[ 357.191813] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMNetPnPEvent'
[ 357.191838] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMResetComplete'
[ 357.191879] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMRegisterInterruptEx'
[ 357.191898] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMSynchronizeWithInterruptEx'
[ 357.191909] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMDeregisterInterruptEx'
[ 357.191921] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisQueueIoWorkItem'
[ 357.191927] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMFreeNetBufferSGList'
[ 357.191933] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisFreeIoWorkItem'
[ 357.191939] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisCancelTimerObject'
[ 357.191945] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisOpenConfigurationEx'
[ 357.191951] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisSetTimerObject'
[ 357.191957] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMGetBusData'
[ 357.191963] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisGetSystemUpTimeEx'
[ 357.191969] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisAllocateNetBufferAndNetBufferList'
[ 357.191975] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisFreeTimerObject'
[ 357.191981] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisAllocateIoWorkItem'
[ 357.191987] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisFreeNetBufferListPool'
[ 357.192002] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisFreeNetBufferList'
[ 357.192019] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMAllocatePort'
[ 357.192029] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisFreeMdl'
[ 357.192038] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMAllocateNetBufferSGList'
[ 357.192048] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMDeregisterScatterGatherDma'
[ 357.192058] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisAllocateTimerObject'
[ 357.192068] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMIndicateReceiveNetBufferLists'
[ 357.192078] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMRegisterScatterGatherDma'
[ 357.192088] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisAllocateMdl'
[ 357.192097] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisCopyFromNetBufferToNetBuffer'
[ 357.192107] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisAllocateNetBufferListPool'
[ 357.192117] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMSetBusData'
[ 357.192126] ndiswrapper (import:232): unknown symbol: NDIS.SYS:'NdisMSendNetBufferListsComplete'
[ 357.192130] ndiswrapper (load_sys_files:200): couldn't prepare driver 'netwsw00'
[ 357.193692] ndiswrapper (load_wrap_driver:103): couldn't load driver netwsw00; check system log for messages from 'loadndisdriver'
In the below link one person claims AP mode working for a similar card (that card also supports soft AP mode as per it's documentation)