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EFI/nvidia/GRUB2 Damn EFI - Framebuffer issue
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aleskandro
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Joined: 05 Sep 2012
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PostPosted: Wed Jan 28, 2015 10:47 am    Post subject: EFI/nvidia/GRUB2 Damn EFI - Framebuffer issue Reply with quote

Hi all, I'm installing Gentoo with EFI (first time in EFI).
I configured all my system and GRUB2 and it starts at the boot but when I select the boot option it freeze the display on "Loading Linux 3.17.7-gentoo"
I read of similar issues about nvidia cards, efi and grub, but I don't solved trying several things (video=efifb, nomodeset, etc).
However I can log into my system via ssh.
It seems to appear that kernel doesn't load efifb driver so it can't create a vga console.
Anyone can help me?

My GPU is Nvidia 750
Here is the dmesg output: http://paste2.org/_v3cMBXgx
Here is my .config: http://paste2.org/_g7pzG23w
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Keruskerfuerst
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PostPosted: Wed Jan 28, 2015 1:53 pm    Post subject: Reply with quote

Can you boot without framebuffer?
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bammbamm808
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PostPosted: Thu Jan 29, 2015 5:00 pm    Post subject: Reply with quote

uvesafb instead of efifb? That's what worked for me.
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aleskandro
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PostPosted: Fri Jan 30, 2015 5:24 pm    Post subject: Reply with quote

I "solved" converting gpt label into mbr, so without efi. And it doesn't use framebuffer... If I boot via vga=ask and select anyone of available resolutions it became blank and boot.
I tried with vesafb, not uvesafb.
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bammbamm808
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PostPosted: Sat Jan 31, 2015 7:05 am    Post subject: Reply with quote

My (older) Nvidia card didn't work with vesafb either, except for 640x480, and with some kernels, not even that. Uvesafb worked fully and enabled me to select a nice dense console resolution.
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MSI MAG B550 Tomahawk
Ryzen 3900x
32Gb Samsung B-die (16GB dual rank x2) DDR4 @ 3200MHz, cl14
Geforce RTX 2070S 8GB
Samsung m.2 NVME pcie-3.0
Etc....
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