开云体育

This is a little off-topic but just curious about an observation.

I recently was given a Motarola Lapdock. ?It's a ~2010 device that Motarola made that is a monitor/keyboard/mouse pad that connects to an old Motorola Atrix phone. ?Basically converting the phone into a laptop computer. ?It has mini HDMI and USB ports that can actually can be attached to a Raspberry Pi and now you have a monitor/keyboard/mouse pad that works with it. ?It works pretty well but the mouse response could be better, but may have some use in the field.

What I found is that it works with a Raspberry Pi 3 (this on running bookworm) but if you hook up a Raspberry Pi 4 or 5 (running Buster 32 or 64 bit or 64 bit Bookworm), the monitor display is rotated 45 degrees and wraps around. ?To get from the top left edge to the bottom right edge, you keep moving the mouse to the right off the right edge and it comes back on the left. I know the Raspberry Pi 4 and latter can do dual displays and I was wondering if that change is the cause of the problem and the lapdock is not compatible with it. ?I don't know anything about video drivers, but was just curious if anyone had some ideas why this happens. ?

A search of the internet show this is a common issue with the labdock but no real explanation of why this occurs.

Larrie
AF7NU

Try going back to X windows and dropping Wayland (do this via shell and raspi-config

also there is a switch for legacy GL drivers which might be needed on config.txt but this was a problem for a lot of displays might be worth a gander

k

This brings back memories of the good old days of manual video card and monitor configuration of X86. May be dating myself, but back when there was only one distro that involved many floppy disk images (and 3.5” disks — thank god they weren’t 5.5” although there were images for those too) you could cause all sorts of interesting video problems. Including exactly what you described. Only had X86 back then.

The fix is in the monitor configuration file if you’re willing to try and modify that. Just a note, you could physically damage — as in release the magic smoke — CRT monitors although I don’t think you can do that to any HDMI monitor.

I won’t be able to find any specific information for a couple days but here’s some info that could help:

Sure wish there was a utility like Xrandr back in the day, would have made things a bit easier!

73 de N0SR