[coreboot] bug report: i945 text-mode native graphics initialization: graphical corruption with starting Debian/Trisquel net installer.

The Gluglug info at gluglug.org.uk
Tue Aug 26 03:06:05 CEST 2014

Hash: SHA1

The same issue does not occur when using coreboot with the vga rom
extracted from factory bios.

On 25/08/14 16:50, The Gluglug wrote:
> Using 6725 to enable text-mode gfx init on X60 when using native 
> graphics initialization.
> Affected machines: X60, T60. It may also affect:
> macbook21/macbook11, X60 Tablet
> This relies on the (merged) patch 6723 that enables text-mode
> graphics initialization on i945 platforms. The code is there.
> I then disabled "Keep VESA framebuffer" in menuconfig, to enable 
> text-mode.
> error: no video mode activated This is what I see when I try to use
> the net install iso for Debian with the isolinux parser in grub. I
> also saw the same thing when trying to start Trisquel 6 isolinux 
> menu from SeaBIOS (with SeaVGABIOS added at vgaroms/vgabios.bin
> from seabios's rom that I built).
> See attached image of what happens when I try to boot the net
> install from Debian (same thing happens with the Trisquel net
> install), using the following: linux (usb0)/install.386/vmlinuz 
> initrd (usb0)/install.386/initrd.gz boot
> As you can see, there is quite a lot of flicker and parts of the 
> screen are missing or corrupt. I think this is related to the
> issue above ("error: no video mode activated").
> The net install for Debian and Trisquel both work when using 
> corebootfb initialization method, but they fail (as seen in the
> image) for text-mode method.
> In case the attachment was scrubbed by the mailing list, I also put
> it here: http://dev.libreboot.org/x60txtmode.jpg
> Trisquel graphical install works (I wasn't able to figure out how
> to boot the Debian graphical install).
> I also enabled it for T60 (adding the keep/drop vesa fb option for 
> t60/Kconfig, based on 6725, and cherry picking 5345) and the same 
> behaviour was observed there.
> What does work in text-mode init (tested): memtest86+ and grub
> invaders.
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