After running apt-get upgrade and apt-get dist-upgrade (july 2012 to the latest), the system came up with no video at all. Everything else seems to be working as I can ssh in and manage everything in a headless fashion from my lan.
In the process of the dist-upgrade, given the choice, I elected to keep the same raspi-config settings (the default settings). Everything worked after rebooting including hdmi video. But after a power-down reset, video was gone.
The system has been running 24/7 rock stable for almost a month with the July version.
This is a version 2 pi, with 512MB ram. I have 4.91v between tp1 & tp2. I don't have another hdmi monitor/tv or (at the moment) another working SD card, so it's hard to bisect this problem (Is it the monitor; the pi, or the upgrade on the card?).
I tried to re-run the dist-upgrade, but the system takes a look and appears to determine that I have the latest version and refuses to re-install.
I've been trying to get another card working by following precisely the instructions in the manual for preparing the card with 'dd' under linux. I've downloaded the latest image and it passes the sha test. It appears that an image is being written to the card as I get a report of:
462+1 record in; 462+1 records out; 1,939,865,600 bytes written.
In the end, the new card does not show any signs of life at all: no blinking lights on the pi, just the red power light. I don't have a lot of experience with SD cards, but I have used 'dd' successfully in the past.
I think if I can get the new card running I will have made some headway. Is there someone that is willing to work with me on that either on or off list?
Of course, any other suggestions would be welcome.
Thanks,
jerome