I just upgraded from R5A12 to R5A26 and can't get the PVR250 tuner to work. I've looked around for duplicate modules under /lib/modules and found nothing. I've also tried recompiling the ivtv drivers to no avail. The tuner module fails to load, but I don't know why. It worked fine under R5A12 for the past 6 months and under R4V5 before that.

Here is the output from dmesg:
Linux video capture interface: v1.00
tuner: Unknown parameter `ntsc'
ivtv: ==================== START INIT IVTV ====================
ivtv: version 0.4.0 (tagged release) loading
ivtv: Linux version: 2.6.13.2-chw-3 SMP preempt 586 gcc-3.3
ivtv: In case of problems please include the debug info
ivtv: between the START INIT IVTV and END INIT IVTV lines when
ivtv: mailing the ivtv-devel mailinglist.
ivtv0: Autodetected WinTV PVR 250 card (iTVC16 based)
ACPI: PCI Interrupt Link [APC3] enabled at IRQ 18
ACPI: PCI Interrupt 0000:01:08.0[A] -> Link [APC3] -> GSI 18 (level, high) -> IRQ 19
ivtv0: Unreasonably low latency timer, setting to 64 (was 32)
msp34xx: ivtv version
msp34xx: init: chip=MSP3448W-A2, has NICAM support, simple (D) mode, simpler (G) no-thread mode
msp34xx: $Id$ compiled on: Oct 9 2005 22:52:16
ivtv0: i2c attach to card #0 ok [client=MSP3448W-A2, addr=40]
saa7115 2-0021: saa7115 found @ 0x42 (ivtv i2c driver #0)
ivtv0: i2c attach to card #0 ok [client=saa7115, addr=21]
tveeprom: ivtv version
tveeprom: Hauppauge: model = 32032, rev = B310, serial# = 6983508
tveeprom: tuner = Philips FI1236 MK2 (idx = 10, type = 2)
tveeprom: tuner fmt = NTSC(M) (eeprom = 0x08, v4l2 = 0x00001000)
tveeprom: audio processor = MSP4448 (type = 1b)
tveeprom: decoder processor = SAA7115 (type = 13)
ivtv0: i2c attach to card #0 ok [client=tveeprom, addr=50]
tuner: Unknown parameter `ntsc'
ivtv0: Failed to load module tuner
ivtv0: loading /lib/modules/ivtv-fw-enc.bin
ivtv0: Encoder revision: 0x02040011
ivtv0: Allocate DMA encoder MPEG stream: 128 x 32768 buffers (4096KB total)
ivtv0: Allocate DMA encoder YUV stream: 194 x 10800 buffers (2048KB total)
ivtv0: Allocate DMA encoder VBI stream: 120 x 17472 buffers (2048KB total)
ivtv0: Allocate DMA encoder PCM audio stream: 455 x 4608 buffers (2048KB total)
ivtv0 warning: i2c client addr: 0x00 not found for command 0x40045403!
ivtv0 warning: i2c client addr: 0x00 not found for command 0x40307603!
ivtv0 warning: i2c client addr: 0x00 not found for command 0x4004760f!
ivtv0: Initialized WinTV PVR 250, card #0
ivtv: ==================== END INIT IVTV ====================
lirc_dev: IR Remote Control driver registered, at major 61
bttv: driver version 0.9.16 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture
cx2388x v4l2 driver version 0.0.5 loaded
lirc_i2c: chip found @ 0x18 (Hauppauge IR)
ivtv0: i2c attach to card #0 ok [client=Hauppauge IR, addr=18]
lirc_dev: lirc_register_plugin: sample_rate: 10
tuner: Unknown parameter `ntsc'

Any suggestions of what I should try next?
Thanx

Here's your problem.

What does your /etc/mythtv/modules/ivtv file look like? I'm guessing that the old one which got carried across due to an auto upgrade has some obsolete options... FYI here's mine which SHOULD work since we've got the same version of the PVR-250 with serial numbers less than 600 apart.

I wasn't aware that that file got carried over from the previous version. Thanks very much for your help. That took care of it.