All Questions
Tagged with framebuffer drm
11
questions
0
votes
0
answers
17
views
Is it possible to get separate framebuffers for displays on Nouveau?
I'm using a simple Nvidia GPU (gt730) to run desktop system on a home server. I'm using nouveau as the GPU driver built-in on the 6.9 latest kernel.
I use FBDEV (on /dev/fb0) to run the X server. /dev/...
- 59
0
votes
0
answers
25
views
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, ...
- 1
2
votes
0
answers
153
views
How does this whole FrameBuffer, DRM, KMS stuff work in todays Linux / Kernel?
I'm confused about what is what nowadays with Linux and video support for the console interface vs X.
Do the /dev/fb* items only relate to the old original framebuffer support?
Does DRM create/support ...
- 291
0
votes
1
answer
765
views
How do I write directly to video memory without xorg?
Kind of an odd question I know, but fifteen years ago I was able to use svgalib on some ancient version of Debian to draw directly to video memory without xorg.
To my dismay I see svgalib was pulled ...
- 487
0
votes
0
answers
413
views
Low-Latency method to read Xorg or DRM framebuffer
I am trying to build an application that can measure the latency/processing time of graphics frameworks on Linux.
My idea is to implement simple programs that react to an input event (e.g. mouse click)...
2
votes
0
answers
704
views
Initializing framebuffer device without udev
I am trying to reduce boot time in a Raspberry Pi 4 using Yocto Linux. The system uses SysV init.
There is psplash that uses framebuffer, and Qt application that uses DRM/eglfs, displayed ...
- 301
3
votes
0
answers
986
views
How can I display graphics on the screen from the kernel over the top of my X11/Wayland session?
I want to draw simple (2D bitmapped) graphics onto my screen (in response to (simple) external inputs) with the lowest latency possible (the order of tens of milliseconds) so I can empirically test ...
- 1,027
2
votes
1
answer
2k
views
mapping linux /dev/fb0 to DDR for displaying
I want to write a linux driver which maps my specified memory address space to /dev/fb0.
the driver should be specified by what part of linux? drm or frame buffer or server X or somthing else? Which ...
- 137
10
votes
1
answer
8k
views
Disable framebuffer in QEMU guests
The QEMU options -display curses and -nographic -device sga (the serial graphics adapter) are very convenient for running QEMU outside of a graphical environment.
(think: remote ssh connection, ...
- 57.9k
2
votes
0
answers
467
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 ...
- 73
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 ...
- 325