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[Rocci <rocci@xxxxxxxxxxxxxxxxxxx>]

This has solved the same problem for me in Lucid.
Using a Leadtek Winfast PxDVR3200H which uses the Xceive tuner and thus requires the xc3028 firmware.
Here is a snippet of dmesg where you can see the connexant cx23885 fails when calling for the xc3028:
[87212.321168] xc2028 1-0061: Error: firmware xc3028-v27.fw not found.
[87212.817558] cx23885 0000:03:00.0: firmware: requesting xc3028-v27.fw
[87212.821636] xc2028 1-0061: Error: firmware xc3028-v27.fw not found.
[87213.826868] cx23885 0000:03:00.0: firmware: requesting xc3028-v27.fw
[87213.830955] xc2028 1-0061: Error: firmware xc3028-v27.fw not found.
[87214.836756] cx23885 0000:03:00.0: firmware: requesting xc3028-v27.fw
[87214.840905] xc2028 1-0061: Error: firmware xc3028-v27.fw not found.
[87215.332971] cx23885 0000:03:00.0: firmware: requesting xc3028-v27.fw
[87215.337075] xc2028 1-0061: Error: firmware xc3028-v27.fw not found.
[87216.336833] cx23885 0000:03:00.0: firmware: requesting xc3028-v27.fw
[87216.341018] xc2028 1-0061: Error: firmware xc3028-v27.fw not found.
[87217.356759] cx23885 0000:03:00.0: firmware: requesting xc3028-v27.fw
[87217.360650] xc2028 1-0061: Error: firmware xc3028-v27.fw not found.
[87697.432050] cx23885 0000:03:00.0: firmware: requesting xc3028-v27.fw
[87697.436599] xc2028 1-0061: Loading 80 firmware images from xc3028-v27.fw, type: xc2028 firmware, ver 2.7
[87697.639143] xc2028 1-0061: Loading firmware for type=BASE F8MHZ (3), id 0000000000000000.
[87698.810198] xc2028 1-0061: Loading firmware for type=D2633 DTV7 (90), id 0000000000000000.
[87698.824291] xc2028 1-0061: Loading SCODE for type=SCODE HAS_IF_5260 (60000000), id 0000000000000000.

You can see where the firmware was loaded after I installed this package and then my card started to work.
Thanks very much for resolving this bug.

-- 
Missing firmware for em28xx DVB-T digital tuner
https://bugs.launchpad.net/bugs/278656
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Bug Team, which is subscribed to linux-firmware-nonfree in ubuntu.

Status in “linux-firmware-nonfree” package in Ubuntu: Fix Released
Status in “linux-firmware-nonfree” source package in Lucid: Fix Released
Status in “linux-firmware-nonfree” source package in Karmic: Fix Released

Bug description:
Firmware for digital tuner "Terratec Cinergy XS Hybrid", which is a em28xx based tuner.

Reports in dmesg that the firmware file is missing:

[   31.688078] firmware: requesting xc3028-v27.fw
[   31.712158] xc2028 2-0061: Error: firmware xc3028-v27.fw not found.

The tuner itself appears to be detected OK and it appears as an option under "Kaffeine"

Oct  5 12:46:45 stu-desktop kernel: [   25.994616] tuner' 2-0061: chip found @ 0xc2 (em28xx #0)
Oct  5 12:46:45 stu-desktop kernel: [   26.043833] xc2028 2-0061: creating new instance
Oct  5 12:46:45 stu-desktop kernel: [   26.043838] xc2028 2-0061: type set to XCeive xc2028/xc3028 tuner
Oct  5 12:46:45 stu-desktop kernel: [   26.043862] firmware: requesting xc3028-v27.fw
Oct  5 12:46:45 stu-desktop kernel: [   26.165369] tvp5150 2-005c: tvp5150am1 detected.
Oct  5 12:46:45 stu-desktop kernel: [   26.310118] em28xx #0: V4L2 device registered as /dev/video1 and /dev/vbi0
Oct  5 12:46:45 stu-desktop kernel: [   26.310121] em28xx #0: Found Terratec Hybrid XS
Oct  5 12:46:45 stu-desktop kernel: [   26.310194] usbcore: registered new interface driver zc3xx
Oct  5 12:46:45 stu-desktop kernel: [   26.310198] zc3xx: registered
Oct  5 12:46:45 stu-desktop kernel: [   26.341675] usbcore: registered new interface driver em28xx
Oct  5 12:46:45 stu-desktop kernel: [   26.342788] usbcore: registered new interface driver snd-usb-audio
Oct  5 12:46:45 stu-desktop kernel: [   26.584814] xc2028 2-0061: attaching existing instance
Oct  5 12:46:45 stu-desktop kernel: [   26.584818] xc2028 2-0061: type set to XCeive xc2028/xc3028 tuner
Oct  5 12:46:45 stu-desktop kernel: [   26.584821] em28xx #0/2: xc3028 attached
Oct  5 12:46:45 stu-desktop kernel: [   26.584825] DVB: registering new adapter (em28xx #0)
Oct  5 12:46:45 stu-desktop kernel: [   26.584828] DVB: registering frontend 0 (Zarlink ZL10353 DVB-T)...
Oct  5 12:46:45 stu-desktop kernel: [   26.585256] Successfully loaded em28xx-dvb
Oct  5 12:46:45 stu-desktop kernel: [   26.585258] Em28xx: Initialized (Em28xx dvb Extension) extension

The result is a black screen when entering TV mode in Kaffeine and unable to detect a signal.