I'm cc'ing Andres because he's previously requested various Geode config changes to support OLPC.
On Sun, 2012-09-02 at 22:38 +0300, Martin-Éric Racine wrote:
> Package: src:linux
> Version: 3.2.23-1
> Severity: normal
>
> For some reason, lxfb doesn't understand the recommended method for
> setting the screen mode on non-KMS framebuffers via
> GRUB_GFXPAYLOAD_LINUX in /etc/default/grub.
I think this hand-over only works with basic VGA and VESA drivers, not
with any 'native' video driver.
> This, combined with the fact that lxfb recently started to ship as a
> compiled-in feature, rather than as a module,
It looks like lxfb was always built-in on the 486 flavour and modular on
the 686 flavour, so this change results from the removal of the 686
flavour. I don't see any good reason for the difference and I think it
should be modular on 486 too. (Also, I notice that the Geode
framebuffer drivers are enabled on the 686-pae flavour, which doesn't
run on any of the Geode SoCs!)
> systematically results in this host booting to a rather small 80x30
> console, rather than a graphic framebuffer at a larger resolution.
>
> What I have configuered:
>
> GRUB_GFXMODE=800x600x32,800x600x24,800x600x16,800x600x8,800x600
> GRUB_GFXPAYLOAD_LINUX=1280x1024x32,1280x1024x24,1280x1024x16,1280x1024x8,1280x1024
>
> ... which works fine whenever vesafb use is enforced over lxfb via
> cmdline option video=vesafb, but fails whenever I let the kernel
> choose lxfb as its preferred driver.
Apparently the lxfb driver requires you to specify the mode through the
'lxfb' kernel parameter or the 'mode_option' module parameter.
Ben.
--
Ben Hutchings
Theory and practice are closer in theory than in practice.
- John Levine, moderator of comp.compilers
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