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by ComputerJock
Thu Aug 30, 2012 1:52 am
Forum: Advanced users
Topic: how to copy complete sd card to another sd card
Replies: 9
Views: 9685

Re: how to copy complete sd card to another sd card

Well, I found why it wasn't working... I'm guessing that reading the SD card requires less effort than writing it. I found a bunch of message in kern.log that indicated that the SD card writing was failing. I've subsequently plugged the card reader/writer into a powered hub and it now works. I'd sti...
by ComputerJock
Wed Aug 29, 2012 9:36 pm
Forum: Advanced users
Topic: how to copy complete sd card to another sd card
Replies: 9
Views: 9685

Re: how to copy complete sd card to another sd card

I've followed instructions but am having a problem This is on a running RPi system. I insert an (older RPi) SD card into a USB card reader/writer. Seems to work since I can browse the FS' on the card. I then unmount the two /media mounts. When I do a DD, it quits with a 'no space on device' message....
by ComputerJock
Wed Aug 29, 2012 3:29 am
Forum: Graphics programming
Topic: Dispmanx, video modes: bunch of questions
Replies: 7
Views: 7803

Re: Dispmanx, video modes: bunch of questions

Would you mind to share your program? I am trying to write a program to read JPG file and display it on the screen. Looks like you already get it working. Thanks. Attached. You might need to apt-get the jpg/png development libraries -- I don't remember if they were preinstalled. Untar the attached ...
by ComputerJock
Wed Aug 29, 2012 3:24 am
Forum: Graphics programming
Topic: Dispmanx, video modes: bunch of questions
Replies: 7
Views: 7803

Re: Dispmanx, video modes: bunch of questions

Thanks for the replies. I'm getting the impression that many people here have done development on (I guess) phones, etc. and are familiar with the concepts. For instance, One warning, I have found stability issues if you use more than 64 dispmanx elements. The elements seem to get added without erro...
by ComputerJock
Mon Aug 27, 2012 11:55 pm
Forum: Graphics programming
Topic: Dispmanx, video modes: bunch of questions
Replies: 7
Views: 7803

Dispmanx, video modes: bunch of questions

I started messing with stuff under /opt/vc/src -- started with dispmanx. Very first question: (Q0) Am I wasting my time with this? Should I begin with the GL/ES stuff? (Q1) BTW, what is "dispmanx"? And is what I'm playing with considered "bare metal" as referred under this "Programming" section of t...
by ComputerJock
Tue Aug 21, 2012 2:30 am
Forum: C/C++
Topic: opengl/ changing screen resolution
Replies: 26
Views: 9872

Re: opengl/ changing screen resolution

I'll ask here, if not correct is there a better place to ask? What are the memory layout requirements for the image for each of the various VC_FORMAT_* defines for VC_IMAGE_FORMAT_T in vc_dispservice_x_defs.h. Specifically I'd like to know how to change hello_dispmanx to do RGBA32. And then how does...
by ComputerJock
Sun Aug 19, 2012 6:34 am
Forum: C/C++
Topic: Using dispmanx without EGL - how to use resources?
Replies: 18
Views: 5462

Re: Using dispmanx without EGL - how to use resources?

Where is any of this stuff documented? I looked in /usr/share/doc/libraspberrypi-doc; no mention of any of the libs under /opt (It's also pretty useless -- maybe not to the person who wrote it, but it's got a bunch of stuff about ports but never defines what a port is, how one gains access to it, et...
by ComputerJock
Fri Aug 10, 2012 3:27 am
Forum: Raspbian
Topic: ALSA on Raspbian
Replies: 167
Views: 142164

Re: ALSA on Raspbian

Actually it's worse. I can't play any sound -- or at least I can't hear it. I tried to look at the volume level and that fails too: $ sudo alsamixer cannot open mixer: Invalid argument $ sudo amixer amixer: Mixer attach default error: Invalid argument Report this here? Or is there another place to ...
by ComputerJock
Fri Aug 10, 2012 3:26 am
Forum: Beginners
Topic: Rpi-update
Replies: 8
Views: 3820

Re: Rpi-update

I've just done the rpi-update and have sound issues. aplay will no longer play sound -- or at least I can't hear it. amixer/alsamixer terminate with errors. hello_audio does work tho. So, for a complete beginner, where should this error be reported. You mentioned "gethub". Can you provide a url? Th...
by ComputerJock
Fri Aug 10, 2012 2:44 am
Forum: Beginners
Topic: Rpi-update
Replies: 8
Views: 3820

Re: Rpi-update

rpi-update gets you the latest experimental firmware. It is usually fine, but occasionally may have regressions. You should run rpi-update regularly if you want to help with testing, and are happy to encounter bugs and submit bug reports. You might want want to run rpi-udpate if you are having a sp...
by ComputerJock
Fri Aug 10, 2012 2:24 am
Forum: Raspbian
Topic: ALSA on Raspbian
Replies: 167
Views: 142164

Re: ALSA on Raspbian

Dom posted this new start.elf file which should fix the issue. Replace this start_alsa.elf with your start.elf on the FAT partition on your SD card (ensuring to rename it to start.elf) and try again. This fix (and others) is now in the standard firmware updates, so just update normally, e.g with rp...
by ComputerJock
Thu Aug 09, 2012 4:29 am
Forum: Troubleshooting
Topic: problem running quake 3
Replies: 2
Views: 440

Re: problem running quake 3

I rebuilt it based on instructions posted elsewhere. See http://www.raspbian.org/RaspbianQuake3 It now runs fine. However I cannot connect to a server on a win7 box running the the Q3 demo, nor can I connect from the Win7 box to a server created on the pi. Both machines are on the same local net -- ...
by ComputerJock
Wed Aug 08, 2012 12:27 am
Forum: Raspbian
Topic: ALSA on Raspbian
Replies: 167
Views: 142164

Re: ALSA on Raspbian

Hmmm, can't edit a post so I'll have to reply to it.

I found another post that described the same problem:

http://www.raspberrypi.org/phpBB3/viewt ... 91#p127791

Those folks seem to know what they're talking about, and it appears that the problem is being investigated.
by ComputerJock
Tue Aug 07, 2012 11:36 pm
Forum: Raspbian
Topic: ALSA on Raspbian
Replies: 167
Views: 142164

Re: ALSA on Raspbian

OK, my first post on this forum and it's probably in the wrong place. Please let me know what forum should be used to address possible kernel/hardward errors. My issue: I attempted to play a WAV file using aplay. It is identified by 'file' as: Chime.wav: RIFF (little-endian) data, WAVE audio, Micros...

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