I need to resurrect this one as it affects me at least with the latest
Lucid (Beta 1):
$ uname -a
Linux workstation 2.6.32-17-generic #26-Ubuntu SMP Sat Mar 20 02:23:45 UTC 2010
x86_64 GNU/Linux
$ cat /proc/version_signature
Ubuntu 2.6.32-17.26-generic 2.6.32.10+drm33.1
$ lsb_release -rd
Description: Ubuntu lucid (development branch)
Release: 10.04
The problem what I see here is that the framebuffer devices (/dev/fb[0-9]) get
only set up when the system boots with Kernel Mode Setting.
I do think so because I have a machine with a Radeon Xxxxx card running
with KMS. There I automatically get the device nodes /dev/fb0 and
/dev/fb1. Also the kernel modules get loaded automatically which results
in a nice graphical plymouth and high resolution VTs.
Another machine I have does have a Radeon HD4770 (RV740) for which KMS
support is still broken. To use this card I have to boot with KMS
disabled (radeon.modeset=0 kernel option), which results in the rather
stone-age text boot "splash" and with no high resolution VT's.
Additionally after boot-up I don't have a /dev/fb* device which results
in at least DirectFB to fail:
~~~~~~~~~~~~~~~~~~~~~~~~~~| DirectFB 1.2.8 |~~~~~~~~~~~~~~~~~~~~~~~~~~
(c) 2001-2008 The world wide DirectFB Open Source Community
(c) 2000-2004 Convergence (integrated media) GmbH
----------------------------------------------------------------
(*) DirectFB/Core: Single Application Core. (2010-02-03 18:27)
(*) Direct/Memcpy: Using Generic 64bit memcpy()
(!) Direct/Util: opening '/dev/fb0' and '/dev/fb/0' failed
--> No such file or directory
(!) DirectFB/FBDev: Error opening framebuffer device!
(!) DirectFB/FBDev: Use 'fbdev' option or set FRAMEBUFFER environment variable.
(!) DirectFB/Core: Could not initialize 'system_core' core!
--> Initialization error!
After struggling a lot with kernel modules and boot options I finally found by
accident that adding the "fbdev" kernel option allows my system to provide
framebuffer devices, graphical boot and high resolution VT's.
This is the complete boot line:
BOOT_IMAGE=/boot/vmlinuz-2.6.32-17-generic root=UUID=aac3cf7c-104c-4af2
-930a-b848744a59c0 ro quiet splash radeon.modeset=0
video=uvesafb:2560x1600-60 fbdev
--
No console framebuffer support for modern ATI Radeon HD cards.
https://bugs.launchpad.net/bugs/401514
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