I made three experiments regarding kexec with frame buffer support (vesafb). For each of them I gathered dmesg messages from original and relocated kernel, in order to easily compare them later on. These tests were run on a virtual machine in order to provide the same environment for each experiment.
Here are my tests and related results: 1) Frame buffer not enabled Original kernel command line: root=/dev/hda1 ro Relocated kernel command line: root=/dev/hda1 ro Everything went well, as supposed to be. I was able to read boot messages and to see login prompts. 2) Frame buffer enabled in the relocated kernel Original kernel command line: root=/dev/hda1 ro Relocated kernel command line: root=/dev/hda1 ro vga=791 This time I was able to read boot messages and so on, but I couldn't be able to load vesafb in the relocated kernel. dmesg showed nothing about vesafb. 3) Frame buffer enabled in the original kernel Original kernel command line: root=/dev/hda1 ro vga=791 Relocated kernel command line: root=/dev/hda1 ro {vga=791,} This time I wasn't able to read boot messages in the relocated kernel, whether vga parameter was set or not. I looked at dmesg in order to get some useful informations: Linux version 2.6.13-rc5 ([EMAIL PROTECTED]) (gcc version 3.3.4 (Debian 1:3.3.4-13)) #3 Wed Aug 3 13:39:11 UTC 2005 [...] -Console: colour dummy device 80x25 +Console: colour VGA+ 80x25 [...] -vesafb: framebuffer at 0xf0000000, mapped to 0xc2880000, using 3072k, total 16384k -vesafb: mode is 1024x768x16, linelength=2048, pages=0 -vesafb: protected mode interface info at 00ff:44f0 -vesafb: scrolling: redraw -vesafb: Truecolor: size=0:5:6:5, shift=0:11:5:0 -mtrr: your processor doesn't support write-combining -Console: switching to colour frame buffer device 128x48 -fb0: VESA VGA frame buffer device [...] It seems relocated kernel doesn't (or can't) load vesafb. Is frame buffer supported in kexec or there is some work-in-progress? Regards, -- Luca - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/