Funny video issue with RPi 3

I’ve followed the instructions and successfully got RISC OS 5.23 running on a RPi3. However, I have an annoying video issue where the right hand side of the icon bar is repeated over on the left hand side, obscuring the drives. It doesn’t do this with my RPi2 (running RC14, unmodded), nor does it do it on my TV.

The monitor is a HP L1940T, and is connected with a HDMI to DVI adapter, then a short (<1m) DVi cable into the monitor. When it is connected to my TV, it is using an HDMI cable. The RPi2 will be connected the same way.

This appears to be an issue with the hardware, rather than the OS, as I can see the same issue as the Pi boots up (i.e. on the splash screen). I initially thought it may be the OS, so I upgraded to last night’s RISC OS release (which I’m going to need anyway). I’ve had a look at the configuration file, but I’m nervous about changing any values.

I would upload a picture here, except I can’t figure that bit out either.

Cheers,

Gerald.

What resolution does the monitor report it is receiving?
Do you have any monitor settings in your config.txt?

You say that you think that it’s a hardware issue – have you tried the Pi 3’s SD card in the Pi 2? It could just as easily be a firmware issue.

Hi Chris – the config.txt file is the standard one from RC14:

disable_overscan=1
hdmi_drive=2
fake_vsync_isr=1
gpu_mem=64
init_emmc_clock=100000000
kernel=RISCOS.IMG
framebuffer_swap=0
ramfsfile=CMOS
ramfsaddr=0×508000

I’ll get back to you in a while about the monitor resolution.

Hi Jeffrey – I’m nervous about doing that, because at the moment I have a working Pi (the 2), and I’m not too keen to upgrade the firmware in the Pi 2 just yet. I wasn’t sure if the firmware would go backwards when I put the SD card in the Pi 2 back in afterwards.

The firmware is only stored on the SD card and is loaded from there on each boot, it doesn’t get installed on the Pi itself.

Thanks Jeffery – it has the same result with the new firmware in the Pi2

The monitor reports 1280×1024 @ 60Hz (which is the recommended setting for the monitor) is being displayed.