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How are framebuffers, graphics cards and window systems connected?

Loose TL;DR: is the framebuffer device still used in Linux today? If so, does (for example) the X window system first write to, say, /dev/fb0, and then to GPU, or does it write to GPU directly, ...
mteXD's user avatar
  • 1
1 vote
0 answers
130 views

X writing top of screen to random parts of framebuffer - Xorg problem?

I have an ASUS laptop with an SIS graphics card. The default Xorg generated when I installed Debian (well, technically Raspbian Desktop) was at 640x480, yet it can easily do better as it's a 1280x800 ...
DHeadshot's user avatar
0 votes
0 answers
443 views

Accessing the full screen in console mode

I have a newly installed version Rockchip Debian running on a Libre Computer Renegade that I use solely in console mode. I am trying to get text to take up the entire screen and have managed to ...
gatorreina's user avatar
1 vote
0 answers
181 views

How to set framebuffer's output?

I'm using linux (4.4) and Nvidia proprietary driver (361). A also have two monitors (one VGA, one HDMI). By default (during BIOS stage of booting) the image is displayed only on VGA output. After BIOS ...
yanpas's user avatar
  • 257
2 votes
2 answers
848 views

How does bash print to the screen if not with a framebuffer? [duplicate]

I noticed that a framebuffer doesn't always exist on some systems. In these cases, how does bash print to the screen (assuming it ever uses fb devices at all)? Since there's no framebuffer device, ...
AlexRamallo's user avatar
3 votes
2 answers
876 views

dual monitor with uvesafb / Intel 945GME?

I'm using uvesafb to get a simple framebuffer on a Intel 945GME embedded graphics controller. That works fine. The PC has a single combined DVI+VGA output connector and both outputs currently show ...
Udo G's user avatar
  • 1,123
1 vote
0 answers
432 views

Tegra Mesa GLES without X

I am trying to setup a Tegra 3 (Toradex Apalis T30) based system that will have an OpenGL ES based user interface on a touch screen. Unfortunately the standard Linux4Tegra kernel is seriously outdated ...
Gerharddc's user avatar
  • 325
33 votes
2 answers
53k views

Is it possible to access to the framebuffer in order to put a pixel on the screen from the command line?

I am not sure if it is the only possible way, but I read that in order to put a single pixel onto the screen at a location of your choice one has to write something into a place called framebuffer. So ...
Abdul Al Hazred's user avatar
10 votes
1 answer
4k views

What is the kernel frame buffer?

I was reading the "mplayer" man pages trying to play video using just the console, (I don't have or don't want to install X11). It mentions that I can use the kernel frame buffer device which is ...
manofsteelx's user avatar
3 votes
0 answers
2k views

modetest.c from libdrm tests lists no framebuffers

I wanted to play with KMS since it seems to be the preferred low-level graphics library on Linux. However, after compiling the appropriate modetest.c version (2.4.32, since that's the version of ...
Janus Troelsen's user avatar
26 votes
4 answers
90k views

No framebuffer device: how to enable it?

I'm trying to make a PCMCIA tuner card work in my headless home server, running Debian Squeeze. Now, as I have very big troubles finding the correct command line to capture, transcode end stream the ...
Federico's user avatar
  • 473