Hello, Forgive me if nobody on here is really interested in this stuff but I thought I'd post it on the off-chance it sparks any ideas. I have identified the reason for the crash of SpeakUp in the Raspberry Linux kernel and the mechanism which is responsible. There is a process running called VCHIQ-0. This is a user-space queueing mechanism which provides an interface to the Broadcom GPU on the Pi. It employs a system whereby user-space applications send it messages and they get forwarded to the GPU. This is done for both PCM audio and video. Until recently the bcm2835 driver did not support MMAP. It does now but there are other problems now with text-to-speech sounding very stuttery. It occurred to me that with SpeakUp running in kernel-space, and using espeakup to connect to espeak in user-space, only for ALSA to then use the vchiq mechanism to queue PCM back into kernel-space, would it be possible to write a SpeakUp module which totally encapsulates espeak to execute in kernel-space? Mike -- Michael A. Ray Analyst/Programmer Witley, Surrey, South-east UK Interested in accessibility on the Raspberry Pi? Visit: http://www.raspberryvi.org/ From where you can join our mailing list for visually-impaired Pi hackers
