Messages in this thread | | | Date | Mon, 29 Nov 1999 12:39:26 +0100 | From | Benno Senoner <> | Subject | Re: fbcon + scrolling = irq timeouts? |
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Alan Cox wrote:
> > Has anyone else experienced IRQ timeouts while playing MP3s and scrolling > > large text files in a VESA framebuffer console? From what I can see, no > > cards are conflicting with each other in any way. Maybe someone else can > > help me out. Vital data: > > Welcome to VESA frame buffer. It uses BIOS functions. These can lock the > interrupts off for a long time. Basically no cure available >
before claiming that this is a BIOS issue do the following:
test this on a kernel with the low-latency patch applied with tuned EIDE disks, AND running the mp3 player at higher priority (SCHED_FIFO recommended) than the cat command.
Ian, I own a similar hardware ( dual Celeron with Riva TNT2) , let mk know how to reproduce the timeouts, (which mp3 player are you using what sequence of commands are you running etc.) so I will analyze the problem.
PS: Alan , I think most mp3 players use a relatively big buffersize (most of time the full 64k of soundcard), and I don't think that VESA disables the IRQs for 370ms ( the time it takes to play the 64k audio buffer)
Benno.
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