[Solved] Booting OK, but Screen Stuck

solamour · Last edited by solamour on Sun Oct 06, 2013 11:25 pm; edited 1 time in total

I just installed Gentoo on a relatively new laptop with UEFI. After GRUB2 menu clears, the screen shows "Loading Linux 3.10.7-gentoo-r1 ...", and then stays that way. I know for sure the laptop booted OK, because if I login and type "reboot" without making any typing mistake, the laptop reboots.

I think it has something to do with GRUB2 or kernel configurations, but frankly, I'm not sure where to look for. Please share your suggestions. Thank you.

grub.cfg
http://pastebin.com/J9NHrK8E

kernel config
http://pastebin.com/YKaWtK6E

lspci
http://pastebin.com/vfH7ua0j
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sol

Hu · Moderator Joined: 06 Mar 2007 Posts: 21639

You enabled EARLY_PRINTK, which is often inappropriate outside developer debugging scenarios. The "Loading" message you mention comes from GRUB, which would mean that Linux produces no output at all. If you have ready access to it, it would be interesting to put a known good kernel (e.g. from another of your systems or even an Ubuntu/Fedora kernel) on and try to boot it. It may not transfer to userspace successfully, but the goal is to see whether it can print to the screen at all.

DONAHUE · Posted: Sun Oct 06, 2013 5:13 pm Post subject:

check the user manual for screen brightness and backlight controls and play with them after disk activity ceases.
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solamour · Posted: Sun Oct 06, 2013 7:55 pm Post subject:

I pulled out "initrd.img-3.2.0-48-generic" and "vmlinuz-3.2.0-48-generic" from an old (12.04) Ubuntu, and the laptop booted successfully. Even the network card worked. I'm not sure CONFIG_EARLY_PRINTK is the problem, because it's enabled in Ubuntu kernel as well.

config-3.2.0-48-generic from Ubuntu 12.04
http://pastebin.com/zmQQ1tuY

As for screen brightness and backlight controls, when the screen is stuck, "Loading Linux 3.10.7-gentoo-r1 ..." is still showing, so the problem must be somewhere else.

I can just go with genkernel or Pappy's, but that would be just an easy way out without knowing what the problem is.
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sol

chithanh · Posted: Sun Oct 06, 2013 10:02 pm Post subject:

It could be that the radeon driver does not load successfully or does not support your hardware properly. Boot with radeon.modeset=0 kernel parameter to check. If you really have a Kabini chip, you may want to try kernel 3.11.

solamour · Posted: Sun Oct 06, 2013 11:25 pm Post subject:

The laptop is indeed based on kabini. I tried kernel 3.11 and everything worked out OK. I also got a nice Windows flag as a bonus.

My laptop with Windows flag:
http://i39.tinypic.com/2ccuskj.jpg

More info:
http://unix.stackexchange.com/questions/89296/what-does-the-windows-flag-in-the-linux-logo-of-kernel-3-11-mean

Thanks everyone for taking time to respond.
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sol