Messages in this thread | | | From | "Adam J. Richter" <> | Date | Sun, 12 Dec 1999 10:04:54 -0800 | Subject | Calling VESA BIOS routines from kernel? |
| |
I am contemplating the idea of implementing support in the kernel for calling the VESA video BIOS routines for reading DDC timing information from the monitor (to improve autoconfiguration of the X window system and svgalib). I see that the kernel APM support appears to do something like this, but my naive attempt to do something similar with the DDC calls resulted in a kernel panic.
So, I am wondering: are the APM calls special in that they can still work even though the kernel has already thoroughly messed with the hardware, put the process into 32-bit protected mode, and so on, or are all VESA BIOS extensions generally supposed to support being called from a 32-bit protected mode operating system (i.e., is there hope for this approach, or do I have to try to hack the boot loader)?
Adam J. Richter __ ______________ 4880 Stevens Creek Blvd, Suite 104 adam@yggdrasil.com \ / San Jose, California 95129-1034 +1 408 261-6630 | g g d r a s i l United States of America fax +1 408 261-6631 "Free Software For The Rest Of Us."
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |