Hello all Sorry if my message will be a little bit long... :) I used to have a Mandrake 8.1 with the original 2.4.18 kernel from Mandrake Update, and everything concerning videocapture and TV-tuner worked ok. 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. After upgrade to the latest xawtv, the situation is the same: lirc_gpio works ok, tuner works ok, overlay image is very clean and the driver does not crash; but grabdisplay renders black screen, VBI and videocapture doesn't work at all for the TV tuner. I also have a Quickcam Express which captures ok using the same driver!!! Everyhting works ok when booting the 2.4.18 kernel, except UDMA and lm_sensors, but I'd like to have them both! Does somebody have any idea why this happens? Trying to install a new linux from scratch would be suicide, because I have all my (20GB) work on this HDD; maybe when I'll buy a new hard drive... The v4l messages didn't help me very much, because I couldn't see any change in the IRQ assignments reported to the ones with 2.4.18 kernel. All that changes is that I have Alsa 0.9.6 running with 2 soundcards, but I doubt this would be the problem; they work in WinXP as they are, and at least the Creative Vibra 128 runs also when I boot the 2.4.18 kernel (with Alsa 0.5.3). I tried various kernel boot parameters (noapic and mem=...)but it didn't help. Anybody has an idea? My configuration is a real Christmass tree :) : AMD Athlon XP 1700+ with an Epox 8K9A motherboard (VIA KT400), 256MB DDRAM 333, Supergrace GeForce2 MX 200 video card w 64MB SDRAM, on-board sound VIA 8235 (ALC 650 rev. 0), PCI Creative Vibra 128 soundcard (es 1371, CS4297 A rev 3), USB Logitech Quickcam Express, K-World 878FBK TV/FM card with remote control (almost identical with the Jetway 878 FBK). X-windows server is XFree86-4.1.0-17mdk, tests done with xawtv-3.88-0. Here is some additional info: [florin@localhost tuner]$ cat /proc/interrupts CPU0 0: 256291 XT-PIC timer 1: 9677 XT-PIC keyboard 2: 0 XT-PIC cascade 3: 19741 XT-PIC serial 8: 1 XT-PIC rtc 9: 0 XT-PIC acpi 10: 0 XT-PIC usb-uhci, bttv 11: 2336 XT-PIC usb-uhci, usb-uhci, VIA8233, Ensoniq AudioPCI 12: 40142 XT-PIC PS/2 Mouse 14: 19277 XT-PIC ide0 15: 36 XT-PIC ide1 NMI: 0 LOC: 256244 ERR: 33 MIS: 0 [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 ioctl: VIDIOCMCAPTURE(frame=0;height=32;width=48;format=9): Device or resource busy ioctl: VIDIOCMCAPTURE(frame=0;height=32;width=48;format=3): Device or resource busy ioctl: VIDIOCMCAPTURE(frame=0;height=32;width=48;format=4): Device or resource busy ioctl: VIDIOCMCAPTURE(frame=0;height=32;width=48;format=5): Device or resource busy ioctl: VIDIOCMCAPTURE(frame=0;height=32;width=48;format=1): Device or resource busy ioctl: VIDIOCMCAPTURE(frame=0;height=32;width=48;format=13): Device or resource busy no way to get: 384x288 MJPEG (AVI) no way to get: 384x288 16 bit TrueColor (LE) [florin@localhost florin]$ v4l-conf v4l-conf: using X11 display :0 dga: version 2.0 mode: 1024x768, depth=16, bpp=16, bpl=2048, base=0xe0000000 /dev/video0 [v4l2]: ioctl VIDIOC_QUERYCAP: Invalid argument /dev/video0 [v4l]: no overlay support The part with "no overlay support" is strange, cause overlay is the only mode I managed to get working!!! Thanks for any help! Florin