It is supported under Linux since kernel 2.6.27. (Note: Analog support is not implemented yet).
The HVR-1250 is also known by its codename Coram.
- ? (tuner for analog ... likely a NXP/Philips TDA18271)
- Microtune MT2131 (tuner for digital)
- NXP/Philips TDA8295 (analog IF demodulator)
- Samsung S5H1409/Conexant CX24227 (digital demodulator)
- Conexant CX23887 (A/V Decoder & PCIe bridge)
It has a Subsystem ID of 0x7911.
lspci -vvnn gives
03:00.0 Multimedia video controller : Conexant Unknown device [14f1:8852] (rev 02) Subsystem: Hauppauge computer works Inc. Unknown device [0070:7911] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 11 Region 0: Memory at fce00000 (64-bit, non-prefetchable) [size=2M] Capabilities:  Express (v1) Endpoint, MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us ExtTag- AttnBtn- AttnInd- PwrInd- RBE- FLReset- DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ MaxPayload 128 bytes, MaxReadReq 512 bytes DevSta: CorrErr- UncorrErr+ FatalErr- UnsuppReq+ AuxPwr- TransPend- LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <2us, L1 <4us ClockPM- Suprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- Capabilities:  Power Management version 2 Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities:  Vital Product Data <?> Capabilities: [a0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable- Address: 0000000000000000 Data: 0000
Based on measurement with a Kill-A-Watt and 2 cards plugged in vs. not, each card seems to draw about 6W even when idle.
Making it Work
No firmware is needed for ATSC/QAM functionality.
The cx23885 driver has been upstream since 2.6.27, so should be available in some newer distribution kernels.
Otherwise, get the latest cx18 driver. Then, inside the cx18- directory do
as root. Then load the module
If you are using Suse 10.3, on some systems it will hang on dvbscan as soon as it finds a signal.
If you encounter this issue, compile and install the 2.4.24-3 kernel.
Then recompiling the cx18 against it to fix the issue.
Sample Kernel Output
CORE cx23885: subsystem: 0070:7911, board: Hauppauge WinTV-HVR1250 [card=3,autodetected] cx23885: i2c bus 0 registered cx23885: i2c bus 1 registered cx23885: i2c bus 2 registered tveeprom 4-0050: Encountered bad packet header [ff]. Corrupt or not a Hauppauge eeprom. cx23885: warning: unknown hauppauge model #0 cx23885: hauppauge eeprom: model=0 cx23885: cx23885 based dvb card MT2131: successfully identified at address 0x61 DVB: registering new adapter (cx23885) DVB: registering frontend 0 (Samsung S5H1409 QAM/8VSB Frontend)... cx23885_dev_checkrevision() Hardware revision = 0xb0 cx23885/0: found at 0000:03:00.0, rev: 2, irq: 16, latency: 0, mmio: 0xfce00000 PCI: Setting latency timer of device 0000:03:00.0 to 64
Remote Control Support
The IR Remote is controlled through the cx23885 chip, which is currently not supported in the driver
use scan to get the initial channel list required by [azap]
use azap to tune to the desired channel
use mplayer to watch the channel. Be sure to copy the channels.conf file from the initial scan to your ~/.mplayer directory
mplayer dvb://"Channel Name"