> Jared> I too, have failed to set any vga mode for any Xen > Jared> installation. Could the developers confirm 1 more time that > Jared> it "works for them" (if indeed) and we can try to > Jared> characterize the bug more. > > Apologies for following up to this thread for the third time, but near > as I can tell, this is an open issue. > > Can anyone (developers especially) confirm or deny operation of > extended VGA modes in dom0?To my knowledge I don''t think any of us use extended VGA text modes. I think we''re just rather ''surprised'' that it doesn''t just work. After Xen has relinguished the VGA console, domain 0 should be able to use it however it pleases. However, how does dom0 set the extended text mode? I presume it doesn''t use a BIOS call. Perhaps it can''t cope with the scroll state we leave the console in? The former would be a huge pain. Anything else is probably trivially fixed once the cause is discovered. Ian ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95&alloc_id396&op=click _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
"Ian Pratt" <m+Ian.Pratt@cl.cam.ac.uk> writes:> However, how does dom0 set the extended text mode? I presume it doesn''t > use a BIOS call.Linux uses vesa bios calls in the 16bit startup code, at least for the stuff settable via vga="...". Mode info is passed to 32bit code in struct screen_info (see Documentation/i386/zero-page.txt). Thats why the vga argument needs special treatment by the boot loaders, they can''t just pass it on on the kernel command line like most other args. They have to set a byte in the kernel''s boot sector for that. See also "man rdev". That is really old stuff from the days you have booted your new linux kernel using "cat zImage > /dev/fd0 && reboot". For just more text lines you can simply load a smaller font than the default one somewhere in the dom0 boot scripts to have the same effect. That doesn''t work for 132col txt modes or graphic modes (=> vesafb) though. Gerd -- #define printk(args...) fprintf(stderr, ## args) ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel