related to Linux `fbdev` abstraction (a.k.a. Linux framebuffer), as well as to accessing the framebuffer (a part of video memory) in general

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17
votes
4answers
35k 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 ...
13
votes
2answers
3k views

Kernel Mode Setting vs. Framebuffer?

With KMS, the graphics drivers are moved into the kernel. Since the framebuffer was already in the kernel, I wouldn't expect this to affect framebuffer operation. Yet, I read that KMS supercedes the ...
10
votes
5answers
24k views

How to use /dev/fb0 as a console from userspace, or output text to it

So I have a Palm Pre (original P100EWW) model that I enabled developer mode on, and installed a Debian Squeeze chroot. Works great. I have plans to use this for ANYTHING (bittorrent peer, web server)...
10
votes
2answers
15k views

Can GRUB font size be customised?

I would like to reduce the size of the font of GRUB boot loader. Is it possible and so how?
7
votes
1answer
458 views

Embedded linux LCD not calibrated

I have attached a new LCD to my embedded Linux device and when I run the system I found that it is shifted to the right. (the display starts from the middle of the LCD) I found 2 frame buffer drivers ...
6
votes
1answer
4k views

How can I add an additional framebuffer device in Linux?

I'm running a Ubuntu 12.04 LTS as a home NAS server, without X. Recently I got into tuning it to serve as a video playing media device too. It might've been easier at this point to install X, but I ...
6
votes
1answer
676 views

How to enable VESA framebuffer as default in NetBSD 6.1

When booting NetBSD, the old Tecra 720CDT that I have, works quite nicely in 1024x768x15 mode with vesa fb. I always have to activate VESA when booting the system: > vesa on > vesa 0x116 > ...
5
votes
1answer
4k views

Rotate console on startup (Debian)

I want to rotate my console (not X Server) by 90 degrees (clockwise). The following seems to work for me: echo 1 > /sys/class/graphics/fbcon/rotate; however, I'd prefer to use a kernel option in ...
5
votes
1answer
102 views

Where would I start looking for documentation on the graphical mode of the Linux console?

I'm writing my own display server as an educational exercise. Where in the Linux kernel tree would I look for documentation on the console's graphical mode? Basically, as I understand it, Xorg takes ...
5
votes
1answer
4k views

Hung system call

So I'm working with a custom kernel module that I'm writing a python front end for. The kernel module works, and it adds a framebuffer device file to /dev/fb1. I can read and write to it fine. I've ...
5
votes
1answer
256 views

Specify Monitor For Linux Console

Does the kernel, framebuffer, or a framebuffer driver (uvesafb) have an option to specify the video-card output to use? The kernel only outputs to one monitor: Kernel message buffer (before and ...
5
votes
0answers
426 views

Setting Framebuffer splash resolution when exiting X

I installed a copy of BackTrack 5 R2 (Ubuntu 10.04) to my HDD and dual-booted with Windows 7. After a bit of tweaking I set about updating the native Intel drivers because it was only allowing me to ...
4
votes
1answer
5k views

open /dev/fb0: No such device

I installed fbi framebuffer to view images on TTY terminals (outside X). When I do: fbi image.jpg it outputs the following error: open /dev/fb0 no such device Yet when I run ls /dev/fb*, I ...
4
votes
1answer
1k views

Pivot in text mode (no X) (Pivot = rotated 90 degrees)

How to get rotated video in text mode (no X), even during booting sequence ? OS: Linux Graphics card: mostly ATI, but curious about NVida and Intel solutions.
4
votes
2answers
984 views

How to increase the speed of a text console (kernel mode setting)?

On a Fedora 17 system (i915 hardware) KMS works out of the box - and using the console (i.e. Ctrl+Alt+F2 etc.) is very framebuffer-like. To the point that scrolling through a man page or cat log-files ...
4
votes
0answers
56 views

Can I change the X rotate the xf86-video-fbdev during execution?

Below is my /etc/X11/xorg.conf.d/1-fbdev.conf. /etc/X11/xorg.conf.d/1-fbdev.conf Section "Device" Identifier "LCD" Driver "fbdev" Option "fbdev" "/dev/fb0" Option "Rotate" "UD" EndSection ...
4
votes
2answers
211 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 ...
3
votes
2answers
2k views

Creating a boot splash screen

I've been designing a Linux distro and trying to incorporate a nice user experience into it in the form of pleasing art and an interface that won't confuse or overwhelm first-time Linux users. The ...
3
votes
1answer
53 views

How can I force the console to output to something other than the framebuffer?

I recently recompiled my kernel to support the vesa framebuffer for some Directfb fun but now my console outputs text very slowly. It's almost as if turning on the framebuffer caused my console to ...
3
votes
1answer
2k views

Framebuffer on OpenBSD?

I am migrating from Linux to OpenBSD, and one of the things I miss from my old OS is how even the consoles looked nice (so nice you could actually watch movies in there) under framebuffer using a ...
3
votes
0answers
71 views

Why I need a framebuffer size larger then monitor size when transform destination area is smaller

I tried to remove 100px left & right the top of a 1366x768 screen (as below) using xrandr transformation. But I got an error about not enough framebuffer size. $ xrandr --output LVDS1 --fb ...
3
votes
0answers
202 views

Setting the video output for the framebuffer device

I'm working with Broadcom's 97356 device, which contains an HDMI and an analog video output device. I'd like to be able to draw stuff to one of those two devices (or both at the same time!) using a ...
3
votes
0answers
444 views

add monitor to linux tty framebuffer

Whenever I use my laptop at my desk, I usually connect it to an external display on DP-1. To switch the window manager output to this display, I can just use xrandr --output DP-1 ... However, ...
3
votes
0answers
446 views

When would I use FBDEV vs DRM vs DSS?

I'm new to Linux graphics, and I'm interested in developing a graphics driver. I see that Linux supports three methods for writing graphics to the display device FBDEV DRM DSS2 When would I use ...
3
votes
1answer
1k views

What happened to `vga=ask` in newer kernels?

I used to activate framebuffer mode in the "older" kernels with vga=ask, and later setting it to a value, once I've figured out which one works best for me. Now, this option seems to be gone, the 3....
2
votes
1answer
2k views

What is a framebuffer device and is it required to obtain a higher resolution?

I am running a gentoo guest OS on qemu-kvm. I can only get resolution of 800x600 in it. I want to be able to get a higher screen resolution. xrandr gives the following output : xrandr: Failed too ...
2
votes
1answer
1k views

What is the easiest way to draw graphics on Linux framebuffer?

I have some embedded Linux ARM chip with LCD display on frame-buffer. I connect to chip with serial console. I can access frame-buffer directly with low-level commands. However I need to draw some ...
2
votes
1answer
491 views

How can I move framebuffer or X screen relative position?

A long time ago in a galaxy far, far away I had fixed boot screen using this nice solution. Since that time I have been looking for the way to move framebuffer in virtual console slightly to the right ...
2
votes
1answer
952 views

How do I start a gui framebuffer (no X) application on startup instead of console login prompt?

I have a python application that uses pygame to access the framebuffer directly without using X. I want to start this application on startup instead of showing the console login prompt. I haven't ...
2
votes
1answer
1k views

Writes to FrameBuffer /dev/fb0 do not seem to change graphics screen

In attempting to write directly to the graphics frame buffer /dev/fb0 , (Ubuntu 12.04) , the graphics screen does not change. Has Ubuntu 12.04 invalidated the use of /dev/fb0 , or does it need to be ...
2
votes
1answer
144 views

Extension “RANDR” missing on xvfb

My system: $lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.3 LTS Release: 14.04 Codename: trusty Xvfb: $ dpkg -s xvfb Package: xvfb ...
2
votes
2answers
63 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, ...
2
votes
0answers
654 views

Setting the EFI Framebuffer's Resolution during boot

I've got a MSI WD-60 laptop running Gentoo. It has one of those 3840x2160 screens so I've had to setup Gnome/Firefox/IntellJ to double their DPI for anything to be readable. It all works fine except ...
2
votes
0answers
144 views

Specify Virtual Size using DRM with Frambuffer Emulation

I am attempting make use of double buffering on an AM335x processor. We have an example running on a demo image that was not created by us. I am working on putting together our own image using ...
2
votes
0answers
304 views

Why reading from and writing to framebuffer shows no effect ?

I read a very short description of how to make a Screenshot by making use of the file which represents the framebuffer /dev/fb0. in order to write the screen content: cat /dev/fb0 > file in ...
2
votes
1answer
173 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 ...
2
votes
0answers
1k views

How to create the framebuffer file node?

I'm working with a limited embedded device - Linux environment - that uses a custom DirectFB implementation to draw a user interface in its video output. I would like to exchange this method by a raw ...
2
votes
0answers
286 views

redirecting output of /dev/fb0 to /dev/fb2

I am using IMX6 Saberauto board on Linux OS. I have 2 displays primary is HDMI and secondary is LVDS. I want to run 2 applications. One QT on primary display, which I am able to do. Second ...
2
votes
1answer
604 views

How to redirect and use the framebuffer?

I need to work on the framebuffer to record what is being rendered. Now, I figure out how to convert the framebuffer in an image, I'm currently unable to obtain a constant stream of data from the fb ...
2
votes
0answers
735 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 ...
1
vote
1answer
4k views

How to run an app in a framebuffer?

If I can see a movie from the console (like in this post), then how can I use other apps like Firefox from the console? I'm looking for something that works in Ubuntu, Fedora, or OpenBSD.
1
vote
1answer
1k views

Which systemd service starts text console on the framebuffer device?

I'm working with an embedded platform and need to have /dev/fb0 clear for my own use (the device accessible over serial console while the screen is used to display information, without X.). I've ...
1
vote
1answer
355 views

How to install drivers for integrated intel graphics?

I am building a minimal Debian system. I installed Debian Wheezy with the netinstall iso, and selected to install only basic system utilities, no desktop environment. The computer that is running this ...
1
vote
2answers
94 views

Use/Grab the only keyboard with no user logged locally

I have a raspberry pi running some software (I have the source) that needs user interaction and has a special (USB) keyboard with only 3 keys. The program runs on framebuffer (SDL) and is launched ...
1
vote
1answer
294 views

Can I enable framebuffer support in xterm [closed]

Can I enable framebuffer support in xterm? If yes, how can I do it? If no, what terminal emulator have a framebuffer support?
1
vote
0answers
15 views

How to have better transition between Splash Screen and Program in Frame buffer?

I am currently using Yocto Embedded Linux with frame buffer. When the machine is boot up, there is a splash screen. After the the splash screen, I will run rc.local to autostart my program. The ...
1
vote
0answers
39 views

Check if laptop is asleep

Does anyone know to check via SSH or bash script whether or not my laptop has "fallen asleep". For some reason whenever my laptop falls asleep my drawings (on /dev/fb0) are over ridden by the ...
1
vote
0answers
18 views

Load NVIDIA module for X and load nouveau module for framebuffer: automatically

NVIDIA driver doesn't have support for framebuffer console. I want Linux kernel to automatically load NVIDIA for X window system, and nouveau for framebuffer console. There should be a method to ...
1
vote
0answers
12 views

The window would like the X- represents at the same time in two frame buffers

I'm using the two frame buffer. /dev/fb0: 1024x768 (LCD) /dev/fb1: 1920x1080 (HDMI) I want to be the same content simultaneously on two frame buffer output. Is there any way ?
1
vote
0answers
49 views

Is there some way of simulating a framebuffer device?

I'm starting to write a small software that I intend to run on embedded linux, and I want to draw the GUI using a framebuffer device. However, since I want to be able to test the software on my ...