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10-17-2011, 04:44 PM
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#1
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Member
Registered: Mar 2009
Location: South Korea
Distribution: Lubuntu, Gentoo, LFS
Posts: 311
Rep:
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Getting the framebuffer up and running in Linux 3.0.4
Hey everybody
I have been working on getting my very own Linux distro up and running. I have a few questions, but I will separate them into separate post since they have nothing really to do with each other.
Right now I have a bootable linux system, it will boot on real hardware, but for development purposes I am using qemu. Once the system boots, it opens a getty on /dev/tty0. That works great, but I want graphics. So I have installed an Xserver, but I wanted to keep it small so I went with Kdrive Xfbdev, which needs a framebuffer device at /dev/fb0. I had it working with Linux 2.6.34, on boot I had to add "vga=792" to the kernel command line along with enabling vesafb in the kernel .config. That worked and I could get X running. Now, I have upgraded to kernel 3.0.4, and I did everything the same, enabled vesafb and added the same kernel options, but now on boot, the kernel asks me which video mode to use, no matter what I select, the framebuffer device does not show up in /dev/. How do I get vesafb working in Linux 3.0.4 and why has it changed from previous versions?
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10-18-2011, 08:07 AM
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#2
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Member
Registered: Mar 2009
Location: South Korea
Distribution: Lubuntu, Gentoo, LFS
Posts: 311
Original Poster
Rep:
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Quote:
Originally Posted by prushik
Hey everybody
I have been working on getting my very own Linux distro up and running. I have a few questions, but I will separate them into separate post since they have nothing really to do with each other.
Right now I have a bootable linux system, it will boot on real hardware, but for development purposes I am using qemu. Once the system boots, it opens a getty on /dev/tty0. That works great, but I want graphics. So I have installed an Xserver, but I wanted to keep it small so I went with Kdrive Xfbdev, which needs a framebuffer device at /dev/fb0. I had it working with Linux 2.6.34, on boot I had to add "vga=792" to the kernel command line along with enabling vesafb in the kernel .config. That worked and I could get X running. Now, I have upgraded to kernel 3.0.4, and I did everything the same, enabled vesafb and added the same kernel options, but now on boot, the kernel asks me which video mode to use, no matter what I select, the framebuffer device does not show up in /dev/. How do I get vesafb working in Linux 3.0.4 and why has it changed from previous versions?
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OOPS!
Turns out that linux 3.0.4 works exactly the way it used to as far as vesafb is concerned. I was just booting from the wrong kernel the whole time. My bad.
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