Hello again, I finally solved the problem. It works when de-activating ACPI PCI support in kernel and tell it about the system RAM ( "pci=noacpi mem=256M" ). However, for this to work, I had to cold boot the system. Rebooting from Windows XP or ACPI mode kernel didn't get capture and grabdisplay working. Wrote this thinking it might be useful. Florin >I recently upgraded to a 2.4.21-0.13mdkcustom kernel which I backported >(hacked) from Mandrake 9.1 distro; nothing else essential changed in my >installation. I did that to support the UDMA of my KT400 chipset. But >the videocapture and grabdisplay in xawtv doesn't work anymore. >Upgraded to bttv-0.7.107; same result. Tried 0.9.11; same result. I >patched the kernel (and bttv drivers) with i2c-2.8.0, which I needed >anyway to support my thermal sensors; nothing changed. >I tried various kernel boot parameters (noapic and mem=...)but it >didn't help. Anybody has an idea? >[florin@localhost florin]$ xawtv -c /dev/v4l/video1 (yes, I have 2 v4l >devices and it works witk the 2.4.18 kernel!) >This is xawtv-3.88, running on Linux/i686 (2.4.21-0.13mdkcustom) >Loading required GL library /usr/X11R6/lib/libGL.so.1.2.030402 >v4l: timeout (got SIGALRM), hardware/driver problems? >ioctl: VIDIOCSYNC(int=0): Interrupted system call >ioctl: VIDIOCMCAPTURE(frame=0;height=32;width=48;format=15): Device or >resource busy >no way to get: 384x288 MJPEG (AVI)