nanoDLP

No, thats what I meant.

Shahin:

I have the exact same problem with the latest build available for download.  If I plug the Pi 3 into a HDMI TV, I can see the bootup text scroll past when I first power the Pi.  However, if I plug it into my projector and reboot, I do not see any bootup text nor will the projector display Calibration images nor sliced images during a print. 

I'll give you the whole background:

Prior to last night, I had an old Raspberry Pi 2 running NanoDLP and I had frequent kernel panics with it - happened every 2-4 weeks.  Thinking it was the SD card, I replaced it with a new Sandisk 32GB card.  I obtained a kernel panic a week later, so I upgraded the pi to a Pi 3 with a 2A/5V power supply, Sandisk 16GB microSD card last night.  My projector is an Acer X1240, which only has a VGA port.  However, on my old Pi 2, I was successfully using a HDMI --> VGA adapter for months with NanoDLP and my LittleRP so I know the cable adapter is good.  I used the latest stock Raspbian Jessie Light September 2016 image from https://www.raspberrypi.org/downloads/raspbian/ followed by using the command line to manually install NanoDLP.  I plugged in the HDMI/VGA adapter and VGA cable, turned on the projector, and then powered on the Pi 3.  I did not observe text scrolling from the projector - nor any images at all.  NanoDLP ran fine and I accessed the Calibration tab in my browser and clicked on the Display button for each of the calibration images.  Nothing appeared from the projector.  I performed a sudo apt-get update / sudo apt-get upgrade and rebooted.  Still no change.  At this point, I'm a bit confused what is going on as it should be displaying something - even during bootup.

Any help would be appreciated!

Last edited by sgraber (2016-11-09 15:54:10)

@sgraber did you try taking out the SD from the RPI3 and putting it on RPI2 and see if it would work? This worked for me last time but not now.

My first asumption was something changed on the HDMI handling but that did last until i decided to go jesse and latest nanodlp

Then it wont work neither on raspi2 nor raspi3....

Damn!

I meant HDMI on the Pi....

Any chances for downgrading or making older versions available just for test purposes?

Im not even able to get patterns nor text on bootup to display....

bolsoncerrado,

I can prepare old version of nanodlp for you, but as mentioned above it is very unlikely nanodlp caused this issue. It is the most probably GPU firmware related which should be handled separately using rpi-update command.
Another alternative is to use our raspbian old image available on nanodlp download page. I know it is very annoying but unfortunately these bugs could popup everywhere as we are not common users of rpi.

Firmware downgrade crashed my Pi. 

This time, I installed the NanoDLP Pi image from the Download page (instead of using a stock Raspbian image and manually installing NanoDLP).  As of this install, the NanoDLP version is #1209.  I can confirm that this version of NanoDLP does work with the projector.  So the take-away is that there is something fundamentally different between the Download NanoDLP image and doing the manual Raspbian/wget NanoDLP install. 

I'd like to upgrade to the latest version of NanoDLP (as it looks like some threading issues were resolved), but I'm a bit nervous that if I do it'll cause that problem to reappear...

Ok, I'll do that this weekend.  I need to get a bunch of prints done first. 

Did you receive picture just after using nanodlp SD image?

Are you sure your projector is not faulty? Do you receive image by connecting the to the PC?