On Sunday 29 January 2012 19:38:47 Peter Stuge wrote:
Prakash Punnoor wrote:
- seabios payload: no gfx output, but postcode is F8
Focus on this. What is the serial output from coreboot and SeaBIOS?
That's the thing: I don't have a serial port on this mainboard, that's why I had to do painful post code debugging...
Maybe you can use some of the other methods for debug output. USB Debug device or RTL8029?
Thx for the hints. I knew about the USB debug device, but it seems too costly and also there is no guarantee it will work. But I have an ancient RTL8029AS which I tried. I didn't get any output, though. I configured it properly in menuconfig. (I didn't change the default ioport. Linux chooses 0xbf00, but 0xe00 seems to be free, as well...) Do I have to call some function in the code to enable console output via ethernet? I checked the connection in Linux and it worked. (I use a cross-over cable, btw.)
For serial output from SeaBIOS or later coreboot stages a PCI based serial port would also work.
Ok, this would be my second option if above doesn't work.
Thanks,
Prakash