I've an intel i5-460M and a nvidia GT 425m card, with the latter not in
use. I've the same issue: although the splash screen has a background
color (blue for Kubuntu), the splash screen is a text-only splash.
On my previous installation, I upgraded from Maverick to Natty. In Maverick,
the splash screen was working fine, after the upgrade the above problem began
to occur.
When using the Maverick kernel (2.6.35-28) to boot into Natty, the splash
screen works fine. I've looked at the differences between the initrd of
maverick and natty, and the only differences were the kernel files
(/lib/modules/*).
A fresh installation of Natty did not help, the problem still exists.
I've compared debug logs (add plymouth:debug as boot option, it will
generate a log at /var/log/plymouth-debug.log) of two identical systems
running maverick and natty, and the problem is that the intel driver is
not loaded or something:
The relevant output on maverick is:
[./plugin.c] create_backend:creating renderer
backend for device /dev/dri/card0
[./plugin.c] load_driver:Attempting to load
driver 'i915'
Natty shows:
[./plugin.c] create_backend:creating renderer
backend for device /dev/dri/card0
[./plugin.c] load_driver:Attempting to load
driver '(null)'
[./plugin.c] load_driver:drmOpen failed
[ply-renderer.c] ply_renderer_open:could not open
rendering device for plugin /lib/plymouth/renderers/drm.so
[./plugin.c] create_backend:creating renderer
backend for device /dev/fb0
[./plugin.c] open_device:could not open
'/dev/fb0': No such file or directory
[ply-renderer.c] ply_renderer_open:could not open
rendering device for plugin /lib/plymouth/renderers/frame-buffer.so
[./plugin.c] open_device:could not open
'/dev/fb0': No such file or directory
[ply-renderer.c] ply_renderer_open:could not open
rendering device for plugin /lib/plymouth/renderers/vga16fb.so
[ply-renderer.c] ply_renderer_open:could not find
suitable rendering plugin
[main.c] add_default_displays_and_keyboard:could not open renderer
/dev/fb
[main.c] add_display_and_keyboard_for_terminal:adding display and
keyboard for /dev/tty7
Looking in the source code (apt-get source plymouth), the message comes from
plymouth-0.8.2/src/plugins/renderers/drm/plugin.c:473.
`null` refers to the driver name, and is defined in the line above (472) by
calling find_driver_for_device("/dev/dri/card0").
Reasons why that function may return NULL:
- /dev/dri/card0 does not exist
- /dev/dri/card0 is not a character device (unlikely)
- /sys/dev/char/XX:YY/device/driver does not exist (run `stat -c'%t.%T'
/dev/dri/card0` to get XX:YY)
- The previous link in /sys/... did not point to a valid driver (i915)
When booting with the options `quiet splash` options removed, and `nosplash
break=top` added (drops to a shell before running local-top scripts like
plymouth), I checked some stuff:
- cat /proc/modules: no modules seems to be loaded
- ls -l /dev/dri/card0: missing AHA! PROBLEM FOUND!
Next, I try to load the i915 driver manually:
modprobe i915
When done, I pressed Ctrl + D (exit) and w00t: the nice splash screen finally
shows up!
Now I need to find a way to fix this in a proper way.
** Attachment added: "/var/log/plymouth-debug.log on an ugly splash screen"
https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/770371/+attachment/2183984/+files/plymouth-debug.log
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https://bugs.launchpad.net/bugs/770371
Title:
Splash screen in text mode at boot up
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