Hi Paolo, maybe the resolution scaled from 1024x600 is not supported by the projector firmware. Can you try setting your screen to a more common resolution (800x600 or 640x480)?
You can also pass the option -o video_size=800x480 on the command line to am7xxx-play, however in this case only a portion of the screen will be displayed.
JFYI, the code from git can also set the brightness on PicoPix devices, while the 1.4 stable version does not.
Ciao, Antonio
Caro Antonio,
it worked out! I set the resolution of my netbook (Asus EEE 1015PED, Xubuntu 13.10) to 800x600 and it worked like a charm. If I run am7xxx-play as a simple user, it works at first, but crashes after some minutes:mandrake@goldrake:~$ am7xxx-play -f x11grab -i :0.0
scan_devices: am7xxx device found, index: 0, name: Philips/Sagemcom PicoPix 2055
[x11grab @ 0x86d26a0] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 800 height: 600
[x11grab @ 0x86d26a0] shared memory extension found
[x11grab @ 0x86d26a0] Estimating duration from bitrate, this may be inaccurate
Input #0, x11grab, from ':0.0':
Duration: N/A, start: 1391502870.300348, bitrate: 921600 kb/s
Stream #0.0: Video: rawvideo, bgra, 800x600, 921600 kb/s, 60 tbr, 1000k tbn, 60 tbc
Errore di segmentazione (core dump creato)
However, if I run it as root:sudo am7xxx-play -f x11grab -i :0.0
it works perfectly (no "Errore di segmentazione"/"Segmentation fault"). It doesn't matter however: I'll runt it with sudo and stay happy.
Thank you so much: this will change my everyday teaching routine. From now on I'll project stuff during every single lesson of mine!
Paolo
Good post. I'm dealing with a few of these issues as well..
Hi, I have an AOC E2251FWU USB monitor (i.e. power and video through single USB connected cable to external monitor, just like it does with a USB connected projector). The suggested driver for this monitor is DisplayLink, however when duplicating my laptop screen on the monitor the image displayed is only slightly larger than the laptop screen size with a thick black border, i.e. the laptop screen image doesn't fill the monitor screen. I'm therefore Googling to find other drivers that I can install that will magnify the laptop screen to fill the AOC 22" monitor screen. Sorry far my Googling has been unsuccessful until I landed on your page about drivers for USB projectors. This got me wondering that maybe a USB projector driver will work for my AOC monitor. Or if not whether someone could modify a USB projector to work with the AOC monitor? I'm reasonably technical but not a developer... the limit of my capability in this would probably be to be able to download a driver installer on my laptop and install it. Details of my laptop if needed are: 64 bit Windows 7 Lenovo X240 11" Intel i5 4300U processor, 4GB RAM.
It would be great if someone could help me out.
Hi Philip, if it's a DisplayLink device it needs a DisplayLink driver. It's a matter of the communication protocol used over USB rather than the display technology (LCD panel or projector lamp). FYI, the projectors I deal with do not use the DisplayLink protocol.
About you problem, it sounds like a resolution problem.
I read that the the optimal resolution for your USB monitor is 1920x1080, but your laptop resolution is 1366x768. So I guess the monitor (or the driver) is not upscaling the image. And maybe it is not able to do that at all.
BTW I don't have any Displaylink device and I don't use Windows at all so I am afraid I won't be able to give any further advice.
Ciao, Antonio
Hi Antonio... thanks for getting back to me... from the Googling I've done I believe the driver isn't upscaling the image. I'm hopeful it might be possible to find an alternative driver to use that does upscale instead of using the standard DisplayLink one. Hopefully others might be able to help.
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Hallo,
please advise me if you found any solution for the Acer C120 picopix. I just bought it but I cannot use wit mint. I am quite new with linux and I don't know How to compile and/or install.
Antonio, if you are still planning to develop the driver for the Acer c120 please inform me
Best and thousand thanks
Anto
Hi, the Acer C120 is not an am7xxx device, libam7xxx won't work with it.
There is another driver for the C120 here: https://github.com/slavrn/gm12u320
I am not the author so I can't provide help about it.
Ciao, Antonio
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Hi, I just installed the following .deb packages:
This is the output I get:
mandrake@goldrake:~$ am7xxx-play -f x11grab -i :0.0
scan_devices: am7xxx device found, index: 0, name: Philips/Sagemcom PicoPix 2055
[x11grab @ 0x8f156a0] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1024 height: 600
[x11grab @ 0x8f156a0] shared memory extension found
[x11grab @ 0x8f156a0] Estimating duration from bitrate, this may be inaccurate
Input #0, x11grab, from ':0.0':
Duration: N/A, start: 1391437266.473287, bitrate: 1179648 kb/s
Stream #0.0: Video: rawvideo, bgra, 1024x600, 1179648 kb/s, 60 tbr, 1000k tbn, 60 tbcand it hangs there, but my PicoPix PPX2055 projector projects nonsense (blue-ish and purple horizontal segments).
Any help?
Thank you,
Paolo
Hi Paolo, maybe the resolution scaled from 1024x600 is not supported by the projector firmware. Can you try setting your screen to a more common resolution (800x600 or 640x480)?
You can also pass the option -o video_size=800x480 on the command line to am7xxx-play, however in this case only a portion of the screen will be displayed.
JFYI, the code from git can also set the brightness on PicoPix devices, while the 1.4 stable version does not.
Ciao, Antonio