abi@manjaro ~]$ dmesg | egrep -i "(mantis|dvb)"
[   10.446368] found a VP-2040 PCI DVB-C device on (03:00.0),
[   10.446454]     Mantis Rev 1 [153b:1178], irq: 16, latency: 32
[   10.446468] mantis_stream_control (0): Set stream to HIF
[   10.446526] mantis_i2c_init (0): Initializing I2C ..
[   10.446542] mantis_i2c_init (0): Disabling I2C interrupt
[   10.446554] mantis_i2c_xfer (0): Messages:2
[   10.446561]         mantis_i2c_write: Address=[0x50] <W>[ 08 ]
[   10.446573]         mantis_i2c_read:  Address=[0x50] <R>[ ff ff ff ff ff ff ]
[   10.446655] mantis_dma_init (0): Mantis DMA init
[   10.446671] mantis_alloc_buffers (0): DMA=0x2d120000 cpu=0xed120000 size=65536
[   10.446685] mantis_alloc_buffers (0): RISC=0x2fa86000 cpu=0xefa86000 size=1000
[   10.446698] mantis_dvb_init (0): dvb_register_adapter
[   10.446706] DVB: registering new adapter (Mantis DVB adapter)
[   10.446708] mantis_dvb_init (0): dvb_dmx_init
[   10.446787] mantis_dvb_init (0): dvb_dmxdev_init
[   10.446990] mantis_frontend_power (0): Power ON
[   10.446999] mantis_gpio_set_bits (0): Set Bit <12> to <1>
[   10.447011] mantis_gpio_set_bits (0): GPIO Value <ffffffff>
[   10.549711] mantis_gpio_set_bits (0): Set Bit <12> to <1>
[   10.549723] mantis_gpio_set_bits (0): GPIO Value <ffffffff>
[   10.653021] mantis_frontend_soft_reset (0): Frontend RESET
[   10.653029] mantis_gpio_set_bits (0): Set Bit <13> to <0>
[   10.653036] mantis_gpio_set_bits (0): GPIO Value <ffffdfff>
[   10.756335] mantis_gpio_set_bits (0): Set Bit <13> to <0>
[   10.756345] mantis_gpio_set_bits (0): GPIO Value <ffffdfff>
[   10.859657] mantis_gpio_set_bits (0): Set Bit <13> to <1>
[   10.859666] mantis_gpio_set_bits (0): GPIO Value <ffffffff>
[   10.962979] mantis_gpio_set_bits (0): Set Bit <13> to <1>
[   10.962993] mantis_gpio_set_bits (0): GPIO Value <ffffffff>
[   11.319586] vp2040_frontend_init (0): Probing for CU1216 (DVB-C)
[   11.376016] mantis_i2c_xfer (0): Messages:2
[   11.376028]         mantis_i2c_write: Address=[0x50] <W>[ ff ]
[   11.376040]         mantis_i2c_read:  Address=[0x50] <R>[ ff ]
[   11.376055] mantis_i2c_xfer (0): Messages:2
[   11.376128]         mantis_i2c_write: Address=[0x0c] <W>[ 1a ]
[   11.376140]         mantis_i2c_read:  Address=[0x0c] <R>[ ff ]
[   11.418548] mantis_i2c_xfer (0): Messages:2
[   11.418558]         mantis_i2c_write: Address=[0x50] <W>[ ff ]
[   11.418570]         mantis_i2c_read:  Address=[0x50] <R>[ ff ]
[   11.418586] mantis_i2c_xfer (0): Messages:1
[   11.418593]         mantis_i2c_write: Address=[0x0c] <W>[ 00 33 ]
[   11.418613] mantis_i2c_xfer (0): Messages:2
[   11.418620]         mantis_i2c_write: Address=[0x0c] <W>[ 1a ]
[   11.418629]         mantis_i2c_read:  Address=[0x0c] <R>[ ff ]
[   11.418647] mantis_dvb_init (0): !!! NO Frontends found !!!
[   11.418853] mantis_pci_probe (0): ERROR: Mantis DVB initialization failed <-1>
[   11.418867] mantis_dma_exit (0): DMA=0x2d120000 cpu=0xed120000 size=65536
[   11.418878] mantis_dma_exit (0): RISC=0x2fa86000 cpu=0xefa86000 size=1000
[   11.418886] mantis_i2c_exit (0): Disabling I2C interrupt
[   11.418897] mantis_i2c_exit (0): Removing I2C adapter
[   11.418930] mantis_pci_exit (0):  mem: 0xf3bcc000
[   11.419015] Mantis: probe of 0000:03:00.0 failed with error -1