So I upgraded from what was, for me, the excellent R5E50 (the first version I could install and run with no issues and no changes, it was great!) to the newest R5F27 (for obvious scheduling reasons). Everything went fine (except for idiot mistakes I made like putting the wrong IP address) until...

The first thing I noticed was a lot of flickering and the normally barely readable text (on my tv) was now unreadable (but recognizable with remembering what it should be saying from previous installs..). But I got through it.

Finally myth-setup ran, and I was treated to enormous fonts. It was a bit tricky but I got through that, got through to mythtv, saw my recordings were still there, etc.

At this point, issues were: fonts either really large, or really small (the program guide). Minor anoyances. Video playback however was weird... during motion it became jaggy -- "stairsteps" is what other posters here described it as, though I only saw this during motion, not on the menus or other gui elements. Also my remote seemed at first to work, then not work, then intermittently, then the next day it worked fine..

I probably should have left it at that, but no, I wanted perfection. So I found that others had apparently determined that the newer nvidia drivers were not playing nice, so I set about to degrade them to R5F1.

The method to do this was to mount the R5F1 image with cloop. Somebody gave http://mysettopbox.tv/phpBB2/viewtopic.php?p=99032#99032 link to instructions of how to do this and copy the drivers over. It worked. Then, you are supposed to switch to the "latest" directory, and run: "dpkg -i --force-conflicts --force-overwrite *.deb". And then when you get an error, run a -P command on the error file. And finally you do another "dpkg -i --force-conflicts --force-overwrite *.deb".

This did not work for me. I then tried other methods to change my nvidia drivers, resulting in my now totally borked mythbox giving me an error on boot: INIT: Id "c7" respawning too fast: disabled for 5 minutes.

My video is the built in Geforce 2 MX on the Chaintech 7NIF2 motherboard (nforce chipset). I believe this is not supported in the latest nvidia drivers, so it needs the legacy drivers. I'm totally confused as to what the latest usable drivers are for my board.

Fortunately my box is now picking up the schedules direct information and is recording shows just fine, I just can't watch anything..

All I need to do is get back to the drivers from R5F1 (or R5E50, since that's what I had before and it was working).

I am posting my successfull solution to the wiki: http://knoppmythwiki.org/index.php?page=NVidiaDriversR5F27

thank you thank you thank you for the great wiki instructions!

My chaintech 7NIF4 is MUCH happier now, and i can use openGl again! All that flickering with the default R5F27 drivers was making me crazy! I appreciate you taking the time to write up the howto on the wiki...

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ASUS P5N7A-VM, 2.5gHz E5200, 2GB crucial DDR2, pvr-250, hdhomerun, URC-8820 remote, Panasonic TH-42PZ80U, LinHES 6.01.00