hvr1300 DVB regression

I'm no longer able with recent kernels to tune DVB channels with my
HVR1300. This is a mythtv box but I replicated the problem using
www.linuxtv.org utilities to exclude mythtv issues.

Using kernel 2.6.26-r4 and 2.6.27-r8 I am able to tune both analog and
DVB channels.
Using kernel 2.6.30-r6 I can only tune to analog channels. 'dvbscan'
returns no channel info.

I suspect a tuner problem.

With 2.6.27 'grep tuner syslog' reports:

cx88[0]: TV tuner type 63, Radio tuner type -1
tuner' 2-0061: chip found @ 0xc2 (cx88[0])
tuner' 2-0063: chip found @ 0xc6 (cx88[0])
tveeprom 2-0050: tuner model is Philips FMD1216MEX (idx 133, type 63)
tuner-simple 2-0061: creating new instance
tuner-simple 2-0061: type set to 63 (Philips FMD1216ME MK3 Hybrid Tuner)
tuner-simple 2-0061: attaching existing instance
tuner-simple 2-0061: type set to 63 (Philips FMD1216ME MK3 Hybrid Tuner)

With kernel 2.6.30:

cx88[0]: TV tuner type 63, Radio tuner type -1
cx88[0]: i2c init: enabling analog demod on HVR1300/3000/4000 tuner
tuner 2-0043: chip found @ 0x86 (cx88[0])
tuner 2-0061: chip found @ 0xc2 (cx88[0])
tveeprom 2-0050: tuner model is Philips FMD1216MEX (idx 133, type 78)
tuner-simple 2-0061: creating new instance
tuner-simple 2-0061: type set to 78 (Philips FMD1216MEX MK3 Hybrid Tuner)
tuner-simple 2-0061: attaching existing instance
tuner-simple 2-0061: couldn't set type to 63. Using 78 (Philips
FMD1216MEX MK3 Hybrid Tuner) instead

Same kernel, another boot:
tveeprom 2-0050: Encountered bad packet header [07]. Corrupt or not a
Hauppauge eeprom.
cx88[0]: TV tuner type 63, Radio tuner type -1
cx88[0]: i2c init: enabling analog demod on HVR1300/3000/4000 tuner
tuner 2-0043: chip found @ 0x86 (cx88[0])
tuner 2-0061: chip found @ 0xc2 (cx88[0])
tuner 2-0061: tuner type not set
tuner-simple 2-0061: creating new instance
tuner-simple 2-0061: type set to 63 (Philips FMD1216ME MK3 Hybrid Tuner)
tuner 2-0061: tuner type not set
tuner 2-0061: tuner type not set

Once the FMD1216ME tuner is detected as 63, the other as 78.

I can test other kernels between .27 and .30 to restrict the problem
area if necessary.

Any other suggestion?

thanks,

raffaele

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