1172
Comment: vbetool/kernel bug symptoms
|
1256
Note about disabling VBE state saving
|
Deletions are marked like this. | Additions are marked like this. |
Line 32: | Line 32: |
* Running this will cause X to fail to start up (black screen except for a static cursor at the top left, can't switch vt), and may cause other problems. (This is a kernel bug.) | * Running this will cause X to fail to start up (black screen except for a static cursor at the top left, can't switch vt), and may cause other problems. (This is a kernel bug.) To avoid this, set {{{SAVE_VBE_STATE=false}}} in {{{/etc/default/acpi-support}}}. |
KernelModesetting
To enable Kernel Modesetting also known as KMS , you need:
a kernel image > 2.6.29 (in Sid since 2009-04-04)
supported graphics card
Intel
i915
To enable KMS on i915 hardware, just add the following lines to /etc/initramfs-tools/modules :
# Enable Kernel Modesetting intel_agp drm i915 modeset=1
And regenerate your initramfs:
# update-initramfs -k `uname -r` -u
At the next boot, the kernel should be handling modesetting.
Known bugs
- pm-utils
#524243 fixed in 1.2.5-2
- vbetool
Running this will cause X to fail to start up (black screen except for a static cursor at the top left, can't switch vt), and may cause other problems. (This is a kernel bug.) To avoid this, set SAVE_VBE_STATE=false in /etc/default/acpi-support.
- linux-2.6
- Do not load any framebuffer drivers other than inteldrmfb (which is provided by i915) if you enable KMS, else you will probably see hard lockups when trying to start X.
xserver-xorg-video-intel 2.7.0 doesn't work fine with linux-image 2.6.29-1. You can fetch a fixed kernel from buildserver sid snapshots (see DebianKernel)