On 05/29/13 at 10:45am, Dave Young wrote:
> On 05/28/2013 08:09 PM, Harald Hoyer wrote:
> > On 05/24/2013 10:22 AM, WANG Chao wrote:
> >> Now only 50plymouth module can pull in 50drm and that's very limited.
> >> Because KMS capable drm drivers are much needed in initrd to have a
> >> frame buffer console on the screen.
> >>
> >> Particularly, when building kdump initrd, plymouth module is omitted,
> >> but drm is necessary to setup a working screen for one sitting in front
> >> of a monitor.
> >>
> >> Signed-off-by: WANG Chao <chaowang@xxxxxxxxxx>
> >> ---
> >> modules.d/50drm/module-setup.sh | 4 ++++
> >> 1 file changed, 4 insertions(+)
> >>
> >> diff --git a/modules.d/50drm/module-setup.sh b/modules.d/50drm/module-setup.sh
> >> index bf33c5b..648e8f4 100644
> >> --- a/modules.d/50drm/module-setup.sh
> >> +++ b/modules.d/50drm/module-setup.sh
> >> @@ -3,6 +3,10 @@
> >> # ex: ts=8 sw=4 sts=4 et filetype=sh
> >>
> >> check() {
> >> + if [[ $hostonly ]] && [ -d /sys/module/drm/drivers ]; then
> >> + return 0
> >> + fi
> >> +
> >> return 255
> >> }
> >>
> >>
> >
> > Hmm, why not let the kdump module depend on drm?
>
> If you do not like it we can consider add it to kdump module..
So now if I build initrd w/o plymouth, I will not have frame buffer
console in initrd. That looks more like a general issue to me.
WANG Chao
>
> >
> > depends() {
> > echo drm
> > }
> >
> > Anyway, do we really need drm for a simple console? Those drivers are really
> > really big and take a long time to load and initialize?
>
> It's a little awkward, after kernel crashing suppose 1st kernel is in
> kms mode, it can not reset to nomodeset, so screen will keep black.
>
> There's no such issue in normal initramfs because bios always reset
> devices for us.
>
> >
>
>
> --
> Thanks
> Dave
>
>
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