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by Cromarty
Thu Jun 28, 2018 9:39 pm
Forum: General discussion
Topic: 64-bit operating system
Replies: 111
Views: 11364

Re: 64-bit operating system

It's rubbish to say there is no point in a 64-bit OS. What about the fact I am trying to run a MongoDB cluster? MongoDB after about 3.2 or thereabouts, does not support 32 bit and the Wired Tiger database engine doesn't either. So for MongoDB I need 64-bits. I am sure there are other applications th...
by Cromarty
Mon Jan 02, 2017 2:00 pm
Forum: General discussion
Topic: Pixel for x86 and accessibility
Replies: 3
Views: 670

Pixel for x86 and accessibility

Hello Why, when Debian was remastered to produce the 'Pixel for x86' Live .iso, were all the Debian accessibility options that make it the best distro for blind people like me removed? I have burned the image to DVD and Orca is not listed in the installed packages. Consequently it is not possible fo...
by Cromarty
Mon Jan 02, 2017 1:56 pm
Forum: Assistive technology and accessibility
Topic: Non-stuttering SpeakUp
Replies: 0
Views: 2514

Non-stuttering SpeakUp

Hello I have changed the way my OMX library and piespeakup is built. There is a new article at: http://www.raspberryvi.org/stories/stuttering.html Basically the change to the ALSA driver in 2013 broke TTS using espeak and since then speakup stutters very badly and crashes the kernel. My OMX library ...
by Cromarty
Thu Mar 03, 2016 8:15 pm
Forum: Raspbian
Topic: Raspbian Jessie (64bit) for RPi3?
Replies: 145
Views: 126924

Re: Raspbian Jessie (64bit) for RPi3?

There is one perfectly good reason for trying to get a 64-bit kernel/whole distro running...because it's there and it will be fun and educational. But I have a question, does the boot-loader code need to change? In other words is there any 'bitness' in the other code in /boot? I have built a cross-c...
by Cromarty
Wed Dec 02, 2015 8:45 am
Forum: Raspbian
Topic: Predictable SSH host keys
Replies: 18
Views: 38696

Re: Predictable SSH host keys

I'm sorry, but are you blind? Another -5 for DL. Looks like he is dipping into the minus numbers on the week. Was it too hard to test what it actually does? I'm totally blind. But that doesn't make me stupid. Please don't use terms like that as insults. Or do you assume all blind folks should be si...
by Cromarty
Mon Dec 22, 2014 11:40 pm
Forum: Graphics, sound and multimedia
Topic: OpenMAX IL demos dependant on any module?
Replies: 0
Views: 301

OpenMAX IL demos dependant on any module?

Hello. I am trying to get some of the OpenMAX IL demos in /opt/vc/... going on a minimalist distro called 'Minibian'. I have installed the userland code and compiled everything but, in particular; hello_audio.bin does not work. OMX_Init returns a non-zero error code. Does the code in these demos dep...
by Cromarty
Tue Sep 02, 2014 3:19 pm
Forum: OpenMAX
Topic: Audio PCM rendering, transition to OMX_StateIdle after alloc
Replies: 2
Views: 2045

Re: Audio PCM rendering, transition to OMX_StateIdle after a

Hello. Things have moved on a bit since my post and I now have things working. But I will certainly look at your link and have a good read. Thanks for the reply.
by Cromarty
Sat Aug 16, 2014 3:43 am
Forum: OpenMAX
Topic: Audio PCM rendering, transition to OMX_StateIdle after alloc
Replies: 2
Views: 2045

Audio PCM rendering, transition to OMX_StateIdle after alloc

Hello. I am trying to write a library to render PCM audio using OMX. I am tearing my hair out trying to get the port to transition to the idle state after allocating buffers. The code is very unfinished but it is in: https://github.com/cromarty/ttsprojects.git This is code to use with the espeak spe...
by Cromarty
Mon Jul 21, 2014 1:26 am
Forum: General discussion
Topic: Analogue audio on B+
Replies: 2
Views: 880

Analogue audio on B+

Hello. I switched on my new Model B+ for the first time tonight and with an external amplified speaker plugged into the analogue audio jack I get a loud buzzing. I presume this is because of the composite audio now being fed out of this socket as well. Is there a setting in config.txt I can use to s...
by Cromarty
Fri Jun 20, 2014 11:06 am
Forum: OpenMAX
Topic: Refilling input buffer in ilclient empty buffer done callbac
Replies: 4
Views: 2406

Re: Refilling input buffer in ilclient empty buffer done cal

That's great. Thanks for your help.

Mike
by Cromarty
Thu Jun 19, 2014 9:15 pm
Forum: OpenMAX
Topic: Refilling input buffer in ilclient empty buffer done callbac
Replies: 4
Views: 2406

Re: Refilling input buffer in ilclient empty buffer done cal

Thanks for a fast reply. Does calling ilclient_get_input_buffer somehow remove the previously emptied buffer? In other words, if I originally specified I wanted two buffers, when the callback is called and I make a call to ilclient_get_input_buffer, and then submit that buffer after filling it, are ...
by Cromarty
Thu Jun 19, 2014 6:23 pm
Forum: OpenMAX
Topic: Refilling input buffer in ilclient empty buffer done callbac
Replies: 4
Views: 2406

Refilling input buffer in ilclient empty buffer done callbac

Hello. I have been looking at the hello_audio example. I want to be able to refill a buffer in the empty_buffer_done callback but I can't really understand in the given example how to get at which buffer is being returned. The definition of the callback in this example is different from the definiti...
by Cromarty
Sat Mar 01, 2014 4:51 pm
Forum: Puppy
Topic: Puppy, sound and networking when you can't see the GUI
Replies: 1
Views: 3022

Puppy, sound and networking when you can't see the GUI

Hello. I am trying to get Puppy up and running on a Pi. The image I am using is 6.5.105, which I think is the latest. The problem is I am blind so I cannot use the GUI. I can mount the SD card in another Linux machine and add files to the directory tree but don't know at the moment how to get DHCP w...
by Cromarty
Mon Jan 06, 2014 7:07 am
Forum: Linux Kernel
Topic: gzipped kernel modules
Replies: 0
Views: 1321

gzipped kernel modules

Hello

I've compiled the kernel several times, but I've never found out how to get gzipped kernel modules like those which the Arch image has (*.ko.gz). Can somebody point me in the right direction for how to make the modules gzip when I do a build?

Thanks
by Cromarty
Fri Jul 12, 2013 7:23 pm
Forum: Arch
Topic: Preventing upgrade of individual kernel modules
Replies: 4
Views: 1261

Preventing upgrade of individual kernel modules

Hello, I am trying to upgrade Arch Linux to incorporate the file-system merges which have recently taken place. But I need to prevent the upgrade of the snd-bcm2835.ko.gz sound-driver module because the changes made at the end of April to add MMAP have broken it for text-to-speech. A fact that seems...
by Cromarty
Fri Jun 21, 2013 12:33 am
Forum: General discussion
Topic: Accessible Arch Linux
Replies: 0
Views: 466

Accessible Arch Linux

Hello. I have just released a version of Arch Linux which has three significant accessibility tools installed and working out-of-the-box: SpeakUp, the console-mode screen-reader. Emacspeak, a talking version of Emacs. brltty, a refreshable Braille display driver. This image is approximately 750MB in...
by Cromarty
Wed May 29, 2013 4:48 am
Forum: Linux Kernel
Topic: GPU update and vchiq
Replies: 2
Views: 3179

Re: GPU update and vchiq

If ALSA still uses vchiq even after the modification to the driver to do real MMAP, what was the purpose of the change? I don't really understand what the change was for if it was not to avoid using vchiq. Javier's page seems to suggest that the change takes vchiq out of the equation.
by Cromarty
Tue May 28, 2013 3:26 pm
Forum: Linux Kernel
Topic: GPU update and vchiq
Replies: 2
Views: 3179

GPU update and vchiq

Hello,

Does the update to the GPU firmware mean that sound applications will not use the vchiq mechanism, assuming correct ALSA config?
by Cromarty
Mon May 27, 2013 1:53 am
Forum: Linux Kernel
Topic: SpeakUp screen-reader fails in VCHIQ-0
Replies: 0
Views: 1748

SpeakUp screen-reader fails in VCHIQ-0

Hello, I have been trying for several weeks to get the SpeakUp console-mode screen-reader to run in Raspbian with any degree of reliability. I have been at this for a while because until I started this I knew nothing about kernel hacking. It has taken me this long to understand that the kernel oops ...
by Cromarty
Mon May 06, 2013 5:47 pm
Forum: Linux Kernel
Topic: printk and the /dev/ttyAMA0 port
Replies: 8
Views: 4506

Re: printk and the /dev/ttyAMA0 port

Thanks for this. Just the kind of advice I needed to get me started debugging SpeakUp. I'm pretty determined to get it to run without crashing. Problem is, as soon as the speech stops, I have no other feedback about whether I have a kernel panic, an oops, or what. Sometimes I can switch consoles and...
by Cromarty
Mon May 06, 2013 3:30 pm
Forum: Linux Kernel
Topic: printk and the /dev/ttyAMA0 port
Replies: 8
Views: 4506

Re: printk and the /dev/ttyAMA0 port

I can't use seyon on the Pi as there is no accessibility for blind users on lxde on Raspbian, or any other distro...yet. I could use seyon in my virtual Vinux machine as that is running the Gnome desktop and Orca
by Cromarty
Mon May 06, 2013 3:07 pm
Forum: Linux Kernel
Topic: printk and the /dev/ttyAMA0 port
Replies: 8
Views: 4506

Re: printk and the /dev/ttyAMA0 port

Thanks for that. I haven't used minicom at all yet so I didn't know it. Seyon sounds good.

Would I be better to start gdb at the other end or just listen for serial traffic?
by Cromarty
Mon May 06, 2013 2:44 pm
Forum: Linux Kernel
Topic: printk and the /dev/ttyAMA0 port
Replies: 8
Views: 4506

Re: printk and the /dev/ttyAMA0 port

Hello. I have three Raspis; 2 512MB Bs and a 256 B. Do you mean I could wire the UART on one to the UART on another, crossing the TX and RX lines? This would be possible. I could then SSH into the monitoring Pi and start minicom listening on the UART. Also, I have ordered a cable with an FTDI USB to...
by Cromarty
Sun May 05, 2013 2:56 am
Forum: Linux Kernel
Topic: printk and the /dev/ttyAMA0 port
Replies: 8
Views: 4506

Re: printk and the /dev/ttyAMA0 port

I think I may have managed to answer my own question. By looking in cmdline.txt: kgdboc=ttyAMA0 Is 'kernel gnu debugger output console' (?) And a kernel oops or panic will cause the kgdb to spit stuff out of this port. I guess I also need to remove: console=ttyAMA0,115200 from cmdline.txt to stop a ...
by Cromarty
Sun May 05, 2013 1:51 am
Forum: Linux Kernel
Topic: printk and the /dev/ttyAMA0 port
Replies: 8
Views: 4506

printk and the /dev/ttyAMA0 port

Hello. I have compiled a kernel with the SpeakUp console-mode screen-reader enabled, but I'm having some serious stability issues with it. It sometimes seems to crash the kernel. In view of the fact I am blind and need the speech working, as soon as a crash occurs and the speech stops, I can't tell ...

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