On Sun, Jan 16, 2005 at 03:59:03PM +0100, Jan Gukelberger wrote: > Hi Ville, > > first of all thank you for your quick and comprehensive reply. :) > I'm forwarding this to my colleagues so hopefully we'll see clearer by > tomorrow. > > > > Why does the wait_event_bla fail? Isn't there any VSYNC interrupt? How > > > can this happen? > > > > Obviously the first thing to check is if your kernel actually supports > > FBIO_WAITFORSYNC ioctl. > > Are there any 2.6 kernels that don't support it? How can we check this? > Probably by looking at the sources?
All 2.6 kernels support the ioctl. > > Secondly make sure the graphics card actually has an irq assigned to it. > > BIOS usually has an option for it. lspci should tell you if the irq is > > assigned. > > > > If everything checks out the next step would probably adding some debug > > printks to the kernel to see what happens. One thing that might be the > > cause is some irq routing problem (ACPI related maybe). > > That means switching ACPI off could help? You could try pci=noacpi or acpi=off kernel options. -- Ville Syrj�l� [EMAIL PROTECTED] http://www.sci.fi/~syrjala/
