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Post install - All characters garbled [semi-solved]
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dataking
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PostPosted: Sat Nov 08, 2014 2:50 am    Post subject: Post install - All characters garbled [semi-solved] Reply with quote

Fresh install. Followed the handbook (since I don't quite know it by heart yet). Go to boot into the new system to continue installing tools and software, and the characters on the screen are all garbled, block-like characters. What happened and how do I fix it?[/url]

Apologies, in advance, for the awful pic.....but you get the idea. (Hopefully.)
Image

(Odd that there isn't an [IMG] tag....
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Last edited by dataking on Sun Nov 09, 2014 8:57 pm; edited 1 time in total
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DONAHUE
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PostPosted: Sat Nov 08, 2014 9:19 pm    Post subject: Reply with quote

were the characters that way throughout the boot process from the opening bios screen? in the bootloader menu? at the start of kernel messages? at the start of kms (mid-kernel load, if applicable)? only at the login screen?
anything funky in the kernel ? not funky -->
CONFIG_FONT_SUPPORT=y
# CONFIG_FONTS is not set
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
Redo Step 6e of the handbook?
add nomodeset to the kernel line for the bootloader?
remove any other video lines from the kernel line?
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dataking
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PostPosted: Sat Nov 08, 2014 9:33 pm    Post subject: Reply with quote

DONAHUE wrote:
were the characters that way throughout the boot process from the opening bios screen? in the bootloader menu? at the start of kernel messages? at the start of kms (mid-kernel load, if applicable)? only at the login screen?
anything funky in the kernel ? not funky -->
CONFIG_FONT_SUPPORT=y
# CONFIG_FONTS is not set
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
Redo Step 6e of the handbook?
add nomodeset to the kernel line for the bootloader?
remove any other video lines from the kernel line?

Grub menu looks normal. As soon as the kernel/init takes over from grub, the garble starts.
Nothing funky in the kernel. Straight up "genkernel all" build.
I'm rebuilding now to see if it does the same thing. Will check the kernel options above, when I get to that step.
I did try redoing the locales (step 6e), with no change.
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DONAHUE
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PostPosted: Sat Nov 08, 2014 9:47 pm    Post subject: Reply with quote

add nomodeset to the kernel line for the bootloader?
remove any other video lines from the kernel line?
genkernel graphics support section is strange. What video card do you have? What video driver do you plan to use?
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dataking
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PostPosted: Sat Nov 08, 2014 10:03 pm    Post subject: Reply with quote

DONAHUE wrote:
genkernel graphics support section is strange. What video card do you have? What video driver do you plan to use?

The video is Intel ValleyView Gen7. As far as the driver, I'll be use whatever works! ;-)
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dataking
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PostPosted: Sat Nov 08, 2014 10:16 pm    Post subject: Reply with quote

DONAHUE wrote:

CONFIG_FONT_SUPPORT=y
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y

The above are all set to "y" in the kernel I'm building now.
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dataking
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PostPosted: Sat Nov 08, 2014 11:42 pm    Post subject: Reply with quote

DONAHUE wrote:
add nomodeset to the kernel line for the bootloader?
remove any other video lines from the kernel line?

How do I do this with grub2? Does it apply to grub2?
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DONAHUE
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PostPosted: Sun Nov 09, 2014 12:05 am    Post subject: Reply with quote

https://wiki.gentoo.org/wiki/Intel should get you there. Intel has fewer choices.

We cross posted!

easiest is straight edit of grub.cfg adding nomodeset to the end of the kernel line. vanishes next time you run grub2-mkconfig -o /boot/grub/grub.cfg .

copy the current menuentry to /etc/grub.d/40_custom and add nomodeset to the kernel line. will be incorporated each time you run grub2-mkconfig -o /boot/grub/grub.cfg .
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dataking
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PostPosted: Sun Nov 09, 2014 9:00 pm    Post subject: Reply with quote

Added VIDEO_CARDS="intel i965" to make.conf. Tweaked some DRM and other video-related settings in the kernel.

Now, the text is only garbled until (I assume) the video driver(s) are loaded. So init output is readable. But the display is still a bit sketchy. The last login line, above the prompt blinks constantly. A little annoying, but this box is going to be headless anyway, so not too much of an issue.
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