Hmmm, hatte da beim ersten mal gar nicht drauf geachtet, ob ein CD-ROM Symbol auf dem Desktop erschienen ist. Hatte nur in die dmesg geschaut....
Habe daher nochmals den Kernel installiert und jetzt mal die auf den Treiber bezogenen dmesg ausgaben beim Start:
[ 52.111511] usb 3-2: new high-speed USB device number 3 using xhci_hcd
[ 52.220770] VBoxPciLinuxInit
[ 52.262288] usb 3-2: New USB device found, idVendor=057c, idProduct=8503, bcdDevice= 1.00
[ 52.262292] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 52.262294] usb 3-2: Product: FRITZ!WLAN AC 860
[ 52.262297] usb 3-2: Manufacturer: AVM
[ 52.262299] usb 3-2: SerialNumber: 5C4979FA5A8A
[ 52.601917] vboxpci: IOMMU not found (not registered)
[ 52.874856] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 52.875268] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 53.460720] usb 3-2: reset high-speed USB device number 3 using xhci_hcd
[ 53.616142] mt76x2u 3-2:1.0: ASIC revision: 76120044
[ 53.781394] mt76x2u 3-2:1.0: Direct firmware load for mediatek/mt7662u_rom_patch.bin failed with error -2
[ 54.432232] usbcore: registered new interface driver usbserial_generic
[ 54.432245] usbserial: USB Serial support registered for generic
[ 54.466989] usbcore: registered new interface driver option
[ 54.467003] usbserial: USB Serial support registered for GSM modem (1-port)
[ 54.657728] mt76x2u: probe of 3-2:1.0 failed with error -2
[ 54.657762] usbcore: registered new interface driver mt76x2u
[ 61.469421] option 3-2:1.0: GSM modem (1-port) converter detected
[ 61.469556] usb 3-2: GSM modem (1-port) converter now attached to ttyUSB0
[ 67.599421] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 67.843799] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 71.424708] bpfilter: Loaded bpfilter_umh pid 2334
[ 73.163648] resource sanity check: requesting [mem 0x000c0000-0x000fffff], which spans more than PCI Bus 0000:00 [mem 0x000c0000-0x000dffff window]
[ 73.163789] caller os_map_kernel_space.part.9+0xda/0x120 [nvidia] mapping multiple BARs
sowie beim Ab und Anstecken des Sticks...
[ 137.879064] usb 3-2: USB disconnect, device number 3
[ 137.879355] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 137.879384] option 3-2:1.0: device disconnected
[ 141.443514] usb 3-2: new high-speed USB device number 4 using xhci_hcd
[ 141.594134] usb 3-2: New USB device found, idVendor=057c, idProduct=62ff, bcdDevice= 3.15
[ 141.594138] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 141.594141] usb 3-2: Product: FRITZ!WLAN USB Stick AC 860
[ 141.594143] usb 3-2: Manufacturer: AVM Berlin
[ 141.594145] usb 3-2: SerialNumber: 5C4979FA5A8A
[ 141.595806] usb-storage 3-2:1.0: USB Mass Storage device detected
[ 141.596042] scsi host8: usb-storage 3-2:1.0
[ 142.612465] scsi 8:0:0:0: CD-ROM FRITZ! WLAN selfinstall 1.00 PQ: 0 ANSI: 0 CCS
[ 142.613559] sr 8:0:0:0: [sr1] scsi3-mmc drive: 52x/52x cd/rw xa/form2 cdda tray
[ 142.613781] sr 8:0:0:0: Attached scsi CD-ROM sr1
[ 142.613885] sr 8:0:0:0: Attached scsi generic sg2 type 5
[ 142.639957] attempt to access beyond end of device
[ 142.639961] sr1: rw=524288, want=2097144, limit=261120
[ 142.639969] attempt to access beyond end of device
[ 142.639971] sr1: rw=0, want=2097137, limit=261120
[ 142.639973] buffer_io_error: 14 callbacks suppressed
[ 142.639975] Buffer I/O error on dev sr1, logical block 2097136, async page read
[ 142.639980] attempt to access beyond end of device
[ 142.639982] sr1: rw=0, want=2097138, limit=261120
[ 142.639984] Buffer I/O error on dev sr1, logical block 2097137, async page read
[ 142.639986] attempt to access beyond end of device
[ 142.639988] sr1: rw=0, want=2097139, limit=261120
[ 142.639989] Buffer I/O error on dev sr1, logical block 2097138, async page read
[ 142.639992] attempt to access beyond end of device
[ 142.639994] sr1: rw=0, want=2097140, limit=261120
[ 142.639995] Buffer I/O error on dev sr1, logical block 2097139, async page read
[ 142.639997] attempt to access beyond end of device
[ 142.639999] sr1: rw=0, want=2097141, limit=261120
[ 142.640000] Buffer I/O error on dev sr1, logical block 2097140, async page read
[ 142.640003] attempt to access beyond end of device
[ 142.640004] sr1: rw=0, want=2097142, limit=261120
[ 142.640006] Buffer I/O error on dev sr1, logical block 2097141, async page read
[ 142.640008] attempt to access beyond end of device
[ 142.640010] sr1: rw=0, want=2097143, limit=261120
[ 142.640011] Buffer I/O error on dev sr1, logical block 2097142, async page read
[ 142.640013] attempt to access beyond end of device
[ 142.640015] sr1: rw=0, want=2097144, limit=261120
[ 142.640016] Buffer I/O error on dev sr1, logical block 2097143, async page read
[ 142.659702] Buffer I/O error on dev sr1, logical block 16, async page read
[ 142.659707] Buffer I/O error on dev sr1, logical block 17, async page read
[ 142.851993] usb 3-2: USB disconnect, device number 4
[ 143.755532] usb 3-2: new high-speed USB device number 5 using xhci_hcd
[ 143.906317] usb 3-2: New USB device found, idVendor=057c, idProduct=8503, bcdDevice= 1.00
[ 143.906321] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 143.906324] usb 3-2: Product: FRITZ!WLAN AC 860
[ 143.906326] usb 3-2: Manufacturer: AVM
[ 143.906328] usb 3-2: SerialNumber: 5C4979FA5A8A
[ 144.040795] usb 3-2: reset high-speed USB device number 5 using xhci_hcd
[ 144.194289] mt76x2u 3-2:1.0: ASIC revision: 76120044
[ 144.267803] mt76x2u 3-2:1.0: Direct firmware load for mediatek/mt7662u_rom_patch.bin failed with error -2
[ 145.141380] mt76x2u: probe of 3-2:1.0 failed with error -2
[ 145.141443] option 3-2:1.0: GSM modem (1-port) converter detected
[ 145.141675] usb 3-2: GSM modem (1-port) converter now attached to ttyUSB0
Für ein paar millisekunden war nu auf dem Desktop ein 2. CD-ROM symbol, ist aber gleich wieder verschwunden. Der Treiber scheint es selbst auszuwerfen oder zu disconnecten.
Im Anhang ist noch das ganze dmesg bis zur o.g. "Start" sektion.... (Anhang, da sehr lang)
Edit: Der Anhang deswegen, weil dort das fritz cdrom /dev/sr1 einen Haufen Buffer I/O errors zu schmeissen scheint