On Sunday 17 April 2005 15:13, Hans Verkuil wrote:
> Does anyone have any experience with this?
>
> I'm trying to setup a second X display using the ivtvdev driver. I've tried
> both ivtv-0.2.0-rc3i and ivtv-0.3.2w. I'm using XFree86-4.3-incr-DMA-08.tgz
> as the ivtvdev driver for X.org 6.8.2. I have no problem loading ivtv and
> ivtv-fb. I can run ivtvfbctl -prepdma without any problems. But as soon as
> I start X using ivtvdev as the second screen I get the following kernel
> messages:
>
> Apr 17 14:39:37 marune ivtv: IRQ: IVTV_IRQ_DEC_DMA_ERR intr 1
> Apr 17 14:39:37 marune ivtv: IRQ: IVTV_IRQ_DEC_DMA_ERR intr 2
> Apr 17 14:39:37 marune ivtv: DMA Registers State: xfer: 0xffffffff, state:
> 0xffffffff dec_addr: 0xfffff
> fff enc_addr: 0xffffffff control: 0xffffffff
I found out that it is precisely all these messages that kill the computer. In
ivtv-irq.c, ivtv_irq_handler(), there are two 'if's handling
IVTV_IRQ_DMA_ERR. I've commented these out and after that it seems to work
fine. These status messages are too verbose for an interrupt handler routine.
Now I get problems with msp3400. I get these messages repeatedly in my kernel
log:
Apr 18 22:57:21 marune msp34xx: I/O error #1 (write 0x12/0x0a)
Apr 18 22:57:21 marune msp34xx: I/O error #2 (write 0x12/0x0a)
Apr 18 22:57:21 marune msp34xx: I/O error #3 (write 0x12/0x0a)
Apr 18 22:57:21 marune msp34xx: giving up, reseting chip. Sound will go off,
sorry folks :-|
Apr 18 22:57:21 marune msp3400: chip reset failed
Note that I'm using the msp source from linux-2.6.11-rc3, not the msp source
from ivtv. I'll have to try that when I have some more time.
Hans
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