All Questions
Tagged with framebuffer linux
59
questions
4
votes
0
answers
78
views
How do I change the framebuffer resolution at runtime without legacy /dev/fb0?
I have a server in production which was booted with a 1080p widescreen monitor attached and it used that when it automatically selected that resolution for the console on boot. Currently, it is ...
- 12.2k
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
0
votes
0
answers
13
views
Linux standalone OpenGL usage
I would like to ask what makes the Linux graphics stack tick and how it all works together.
So far I have understood that it works like this - the Linux kernel exposes GPU drivers through the DRM ...
- 1
1
vote
0
answers
108
views
Boot linux in text mode and without framebuffer?
This used to be the default some years ago: Linux would boot up on a text console, 80x25 characters. I want to get back to that - this is for a number of servers that boot over the net (with PXE) - ...
- 717
0
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0
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18
views
My embedded application doesn't receive keyboard events (Linux framebuffer/Qt+QML application/systemd service/VNC server)
I need to remotely control a Qt / QML application on an embedded ARM instrument. I intended to do that using VNC. This doesn't work. An USB keyboard plugged in the instrument doesn't work either.
NB: ...
0
votes
1
answer
302
views
Buildroot and framebuffer
I am very new to embedded programming so please have some understanding if i sound dumb.
Recently i have built a linux kernel using buildroot tool.
These are the commands i used:
make ...
2
votes
1
answer
2k
views
How to stream the linux framebuffer as video over http
I have an embedded linux system (yocto based) with a framebuffer UI (no X11) and a running web server.
Now I'm asking how to "mirror" the screen contents to a web page. Think of it like a ...
- 13.5k
1
vote
0
answers
153
views
Problems enabling HDMI screen framebuffer on startup for ts_calibrate
I'm running EGT on a SAMA5D4 Xplained board. It uses KMS for output to a HDMI screen. I've got a touchscreen that needs to be calibrated on the first use, I'm using ts_calibrate from tslib. I have a ...
- 11
8
votes
0
answers
2k
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hwinfo --framebuffer shows nothing, can't change grub resolution
I am using a Lenovo Yoga C940 15" with Fedora 34. It has a 4K screen with an nvidia gtx1650 mobile card and integrated intel graphics. I wanted to change the resolution of the GRUB menu because ...
- 233
1
vote
0
answers
186
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Is it possible to access the "frame buffer" so I can change the properties of each pixel?
I don't know if my question is technically correct. Here is what I want to do,
I'm running linux with xorg. The colors on my screen is way too dull. Its not my hardware because when I had windows my ...
- 254
2
votes
2
answers
4k
views
How can I enable TTY console?
I'm running Linux (Debian 10) on a Chromebook (Eve) using a stock Chrome OS kernel (4.4.x) with minor modifications. Everything runs (mostly) fine except that TTY console cannot be accessed via Ctrl+...
- 148
0
votes
0
answers
551
views
How do I allocate memory for a framebuffer loadable kernel module (linux)
I'm writing a 'fake' framebuffer device so I can use my e-reader as an external screen for my raspberry pi. The e-reader part is working fine (https://github.com/llandsmeer/inkvt), but now I want to ...
- 101
0
votes
3
answers
3k
views
How to access and use Linux Frame Buffer without GTK?
I'd like to use /dev/fb0 or whichever other files are provided by the linux.
This in a system specific way as low as possible how to read/write/interpret those device files for GUI frame-buffer non-...
- 11
1
vote
1
answer
379
views
Can gstreamer fbdevsink output to Xvfb virtual framebuffer? Which device to use?
I learned recently how to use Xvfb virtual Linux framebuffer:
https://www.raspberrypi.org/forums/viewtopic.php?f=66&t=261264
I want gstreamer fbdevsink output into a virtual framebuffer, but that ...
- 21
1
vote
1
answer
435
views
Displaying a picture on the framebuffer while running a script created with dialog
I have setup scripts that use the dialog command. They are used to prepare embedded servers.
I'd like to display a picture on a edge while a dialog script is running. The problem is, that dialog by ...
- 11