I am having problems with the same device.

USB ID 185B:0150

After following the instructions with the UDEV rules. The /DEV/DVB folders were created and the I could see the tuner in Kaffeine. However there is no signal and I cannot therefore tune in any stations. ( I have checked to make sure the antenna is connected!)

Also once the UDEV rules are changed lsusb returns nothing.

In DMESG

I see the following

[    9.573327] rtl2831u_module_init:
[    9.573364] rtl2831u_probe: interface:0
[    9.573369] dvb-usb: found a 'VideoMate U90' in warm state.
[    9.577646] rtl2831u_power_ctrl: onoff:1 < sys_0:e0 gpo:01
[    9.577653] rtl2831u_power_ctrl: onoff:1 > sys_0:e0 gpo:01
[    9.578181] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[    9.579592] DVB: registering new adapter (VideoMate U90)
[    9.580086] rtl2831u_frontend_attach:
[    9.596099] rtl2831u_rw_udev: usb_control_msg failed:-32
[    9.596106] rtl2831u_frontend_attach: tuner:2
[    9.829777] Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
[   10.233111] DVB: registering adapter 0 frontend 0 (Realtek RTL2830 DVB-T)...
[   10.233239] rtl2831u_tuner_attach:
[   10.339793] ip_tables: (C) 2000-2006 Netfilter Core Team
[   10.434693] MXL5005S: Attached at address 0xc6
[   10.436329] rtl2831u_power_ctrl: onoff:0 < sys_0:e0 gpo:01
[   10.436336] rtl2831u_power_ctrl: onoff:0 > sys_0:e0 gpo:01
[   10.436755] dvb-usb: VideoMate U90 successfully initialized and connected.
[   10.436833] usbcore: registered new interface driver dvb_usb_rtl2831u
[   12.558067]   alloc irq_desc for 22 on node -1
[   12.558074]   alloc kstat_irqs on node -1

Comparing this to other people’s logs the

[    9.596099] rtl2831u_rw_udev: usb_control_msg failed:-32

Is different. Does anyone know what that means?

Thanks
Peter