[vdr] Using DVB-C and DVB-T at the same time

Recently I got DVB-C tuner and it works well. I already had DVB-T tuner and it has been working well for receiving many and many gigabytes of content. They both worked well alone with Linux 2.6.11.7 drivers but when I installed both, only DVB-C tuner is used for receiving. I added current channels ("SVDRP NEWC <channel parameters>") used in old DVB-T server but no content is received when tuning to those channels.

Am I doing something wrong with VDR 1.3.24? Infra-red remote control (of DVB-T tuner, DVB-C tuner does not have that feature) works as it should, so device is not completely out of business when both tuners are on PCI bus.