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No video signal after rebooting the first time after install
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fachexot
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Joined: 01 Feb 2014
Posts: 34
Location: Nuremberg, Germany

PostPosted: Sun Feb 02, 2014 1:07 am    Post subject: Reply with quote

Thank you all for your patience. I think I will have problems again soon, because of installing X / KMS / Radeon drivers or something else, but I will find a way (like posting here :D) I love you, thank you very much, now I can go to sleep.

(My further questions would be:)

0) I can't make out what went wrong the first times installing. Okay, the first time, I over-tailored the kernel. But second time I did exactly the same except of setting DRM_RADEON and DRM_I915 to 'n' instead of 'm'. Does this make the difference? Maybe the missing kernel parameters in command line were crucial....
1) What is the difference between vesa and uvesa and can I stick with vesa?
2) Do I need KMS?
3) Handbook mentions here that when using framebuffer I have to set those video=uvesa[...] options to kernel command line. Is that correct? I have not done it yet, and it seems to work with framebuffer(?). Am I right?
4) Why is handbook guide refering uvesa instead of vesa?
5) Did I get the following right: genkernel is using udev to decide on-the-fly which modules shall be loaded during boot process. To get controll I have to configure kernel manually (without genkernel) and then I am able to load / not load modules by configuring /etc/conf.d/modules. Correct?
6) What would you do next to get Radeon drivers running?

These question have low prio so - again - thank you all and good night ;)
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NeddySeagoon
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Joined: 05 Jul 2003
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PostPosted: Sun Feb 02, 2014 2:14 pm    Post subject: Reply with quote

fachexot,

fachexot wrote:
1) What is the difference between vesa and uvesa and can I stick with vesa?

VESA works with any graphics card made since about 1998. Eveything it needs is in the kernel.
uvesa adds some userspace exlensions, so you can have a grahical bootup even before X starts.
The userspace extensions go in the initrd and are an extra complexity.

fachexot wrote:
2) Do I need KMS?
KMS is not essential.
You have a choice of three drivers for Xorg.
The vesa one - its slow as there in no hardware 3D support at all
The radeon one, which requires KMS
The ATI binary blob, which is fastest and requires that KWS be off

You can set video=uvesa= ... in your case it would be vesa= as you use the vesa framebuffer. If you don't you get the defaults.

Gentoo works best when you add things then test them. That way when (not if) it breaks, you know what you did and can undo it.
Continue with your install. You can swap graphics drivers later. If you choose the binary blob, you are all set now anyway.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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