I can confirm this. Starting with 8756 tv-out is no longer working for me. This is what the relevant section of the logs say:
(**) NVIDIA(0): TwinView enabled
(--) NVIDIA(0): Connected display device(s) on GeForce FX 5600 at PCI:1:0:0:
(--) NVIDIA(0): NVIDIA TV Encoder (TV-0)
(--) NVIDIA(0): Samsung SyncMaster (DFP-0)
(--) NVIDIA(0): NVIDIA TV Encoder (TV-0): 400 MHz maximum pixel clock
(--) NVIDIA(0): TV encoder: NVIDIA
(WW) NVIDIA(0): TwinView requested, but only 1 display devices found.
(II) NVIDIA(0): Assigned Display Device: DFP-0
(WW) NVIDIA(0): Invalid display device in Mode Description "TV-0:800x600"
(WW) NVIDIA(0): Not using mode description "TV-0:800x600"; unable to map to
(WW) NVIDIA(0): display device
(WW) NVIDIA(0): Unable to find all display devices requested in TwinView
(WW) NVIDIA(0): Orientation string "DFP-0 LeftOf TV-0".
(II) NVIDIA(0): Validated modes:
(II) NVIDIA(0): "DFP-0:1280x1024,TV-0:800x600"
(II) NVIDIA(0): Virtual screen size determined to be 1280 x 1024
The relevant section of my xorg.conf file:
# Option "SecondMonitorHorizSync" "30-50"
# Option "SecondMonitorVertRefresh" "60"
Option "HorizSync" "TV-0: 30-50"
Option "VertRefresh" "TV-0: 60"
Option "TwinViewOrientation" "DFP-0 LeftOf TV-0"
Option "TVOutFormat" "COMPOSITE"
Option "TVOverScan" "0.9"
Option "ConnectedMonitor" "DFP-0, TV-0"
# Option "RandRRotation"
Option "TVStandard" "PAL-B"
Option "MetaModes" "DFP-0: 1280x1024, TV-0: 800x600" #; DFP-0: 1280x1024, TV-0: NULL"
This has always worked with previous versions. Without the video-cable plugged in I had a normal 1280x1024 desktop, with the cable (after restarting the x-server, still annoying, but ok) I had an extended desktop with the right part of 800x600 on the tv. Based on the suggestions here the only way to get tv-out to work is to use:
Option "UseDisplayDevice" "TV-0"
and remove the ConnectedMonitor string. This however ONLY gives me a picture on the tv, and nothing on my monitor. I couldn't find any other mix of settings with which I could get a picture on both screens. And I am certainly NOT going to
edit my xorg.conf EVERY time just to switch between my TFT and TV output to watch a movie.
I hope this gets fixed really soon because as it is now, the new driver is unusable for me.
Additionally while playing with the settings I managed to get the 'garbled screen' again, but only only on the text-console, but also on the X-terminal. It wouldn't go away until I rebooted the machine.