Hi, using linux-3.19.1-1 (Archlinux) I get the following output while booting without the media-build-tree provided by DVBSky: cx23885 driver version 0.0.4 loaded cx23885 0000:04:00.0: enabling device (0000 -> 0002) CORE cx23885[0]: subsystem: 4254:0952, board: DVBSky S952 [card=50,autodetected] cx25840 3-0044: cx23885 A/V decoder found @ 0x88 (cx23885[0]) cx25840 3-0044: loaded v4l-cx23885-avcore-01.fw firmware (16382 bytes) cx23885_dvb_register() allocating 1 frontend(s) cx23885[0]: cx23885 based dvb card i2c i2c-2: m88ds3103_attach: chip_id=70 i2c i2c-2: Added multiplexed i2c bus 4 cx23885_dvb_register() dvb_register failed err = -22 cx23885_dev_setup() Failed to register dvb adapters on VID_B cx23885_dvb_register() allocating 1 frontend(s) cx23885[0]: cx23885 based dvb card i2c i2c-1: m88ds3103_attach: chip_id=70 i2c i2c-1: Added multiplexed i2c bus 4 cx23885_dvb_register() dvb_register failed err = -22 cx23885_dev_setup() Failed to register dvb on VID_C cx23885_dev_checkrevision() Hardware revision = 0xa5 cx23885[0]/0: found at 0000:04:00.0, rev: 4, irq: 17, latency: 0, mmio: 0xf7200000 Obviously there are no device in /dev/dvb. Using the media-build-tree works just fine though. The following firmware files are installed in /usr/lib/firmware: dvb-demod-m88ds3103.fw dvb-demod-m88rs6000.fw dvb-demod-si2168-a20-01.fw dvb-demod-si2168-a30-01.fw dvb-demod-si2168-b40-01.fw dvb-fe-ds300x.fw dvb-fe-ds3103.fw dvb-fe-rs6000.fw dvb-tuner-si2158-a20-01.fw Output of lspci -vvvnn: https://gist.githubusercontent.com/olebowle/6a4108363a9d1f7dd033/raw/lscpi I also set the module parameters debug, i2c_debug, irq_debug and irq_debug in cx23885. The output is pretty verbose and can be found here: https://gist.githubusercontent.com/olebowle/6a4108363a9d1f7dd033/raw/debug.log Thanks, Ole -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html