Hi Patrice,
On 05/11/2015 06:12 PM, Patrice Levesque wrote:
>
> Hi,
>
> my wonderfully old ATI TV Wonder (PCI ID 14f1:8800, module cx8800)
> does not behave properly since I upgraded from Linux-3.18.6 to
> Linux-3.19.6 (Gentoo builds).
>
> I usually spawn MPlayer to use that device; when I use it under
> 3.19.6, I get an image like the one that's attached and the usual
> sound loopback that goes from the TV card to my sound card does not
> seem to be functioning. Booting with 3.18.6 makes everything work
> again.
>
> After a cold boot, with 3.18.6, the first use of the TV card seems
> to provoke some kind of initialization (image takes like 0.5 seconds
> to settle), with 3.19.6, I immediately get the broken image.
>
> Nothing in `dmesg` would indicate something's horribly broken.
>
> What kind of debugging output would be useful to you guys so we can
> identify the issue?
Can you go back to kernel 3.18 and make a small change to the cx88 driver:
edit drivers/media/pci/cx88/cx88-video.c, search for the function restart_video_queue()
(around line 469) and add this line:
printk("restart_video_queue\n");
to the start of the function:
static int restart_video_queue(struct cx8800_dev *dev,
struct cx88_dmaqueue *q)
{
struct cx88_core *core = dev->core;
struct cx88_buffer *buf, *prev;
printk("restart_video_queue\n");
if (!list_empty(&q->active)) {
buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
Compile and test your card, and then mail the dmesg output.
I'd also like to know the exact model of your board. If the 'restart_video_queue'
message appears in the kernel log, then I want to see if I can find this card
on ebay so I can try to reproduce it myself.
Regards,
Hans
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