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25 views

Linux - Anyway to modify framebuffer at OS level?

I'm looking to program something that is able to hook into and modify the framebuffer (say, permanent post processing) across the entire OS, including all programs that open. Is this possible?
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0answers
104 views

Debian - Framebuffer resolution

I use Debian 8 (testing), with nvidia non-free drivers (DKMS). When X is run I've 1920x1080 resolution on full screen. Problems starts, when I switch to console (for example "ctr+alt+1") then I see ...
0
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1answer
182 views

fbterm expected behavior at launch?

I'm working in an embedded linux environment. I have a display setup with the linux framebuffer. I can use the fbgrab to capture the contents of the framebuffer and store it in an image: fbgrab ...
0
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1answer
583 views

fbcon - Use Android/MSM framebuffer device for boot console

I am trying to use a rooted Nexus 5 (msm 8974 chipset) device with Debian running with an X server and linux framebuffer boot console. I have recompiled the default Android hammerhead kernel (with ...
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0answers
78 views

Ubuntu Server (trusty) Minimal - Options for prettier consoles with install Xorg

Q: Is it reasonable to get a fancier terminal emulator working in the consoles using framebuffers? I love the speed in the console, but I really miss my fonts and colors, otherwise I could ...
0
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1answer
103 views

Does the Windows 98 OS/shell use the CPU to write to the framebuffer/display?

I mean does it use the CPU to access MMIO to put pixels on the display without having other hardware (e.g. GPU, etc.) follow-up after it. When Windows 98 boots, it loads an image by whatever program ...
2
votes
1answer
314 views

How to make the linux framebuffer console narrower?

I've just a installed a Debian Wheezy box (Debian 7.0rc1). By default, the console is displayed using the frame buffer, and due to a certain hardware setup I won't go into, this comes out too wide on ...
0
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1answer
590 views

Image format the same as /dev/fb0

Is there an image format that is the same as /dev/fb0? So that dd if=the_image of=/dev/fb0 would display the image?
13
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2answers
16k views

can I display a JPG or PNG to the framebuffer (/dev/fb*)?

I know I can capture the framebuffer in linux using something like cp /dev/fb0 ~/myimage and re-display that by coping back to the device like so cp ~/myimage /dev/fb0. What format is the framebuffer ...
1
vote
1answer
3k views

Linux boot - stop the kernel switching to a new framebuffer mode clearing output

I'm working on an embedded system (based onUbuntu 12.04 LTS) and I'm customizing its kernel. I'm having some problem with upstart, mountall and plymouth. Nothing unsolvable I suppose, but the real ...
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vote
0answers
405 views

Understanding how LabView buffers work

I am using LabView for an imaging project. In the code I have two separate while loops running (for the most part) independently. The small dependence -if this is a dependence at all- comes from the ...
2
votes
2answers
3k views

Disable double buffering entirely or render cursor without double buffering in OS X?

Currently, in OS X, the entire system is drawn using double buffering through Quartz. The purpose of this is, as far as I know, to eliminate screen tearing. The reason I would like double buffering ...
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vote
0answers
1k views

Screen shows only vertical colored stripes (red, green or blue) on black background

First let me point out that this has never occurred when booting Windows. So I don't think it's damage on the hardware. So, I'm booting my Inspiron 1501 laptop running Debian, and the XDM (X Display ...
1
vote
2answers
616 views

Arch Linux frame buffer changes?

I have an old computer running on P4 processor and ATI Radeon RV100 QY [Radeon 7000/VE] graphics card. Whenever I quit any window manager, the screen goes blank, but it still accepts input i.e. I can ...
5
votes
2answers
853 views

Why can video streaming sites not leverage my 100 MBit LAN-speed?

I am a bit confused about what is slowing down my network and I hope it is correct to ask here and not at "webapps.sx.com", because my issue is not only one with YouTube, but basically many video ...
0
votes
1answer
658 views

KVM/QEMU SDL output to framebuffer

I want a KVM guest with SDL graphics on a host that does not run X. From what I've read, SDL supports output to the framebuffer, but I can't find much on the topic.
2
votes
0answers
398 views

How to display a framebuffer and some stdout text

So I have this program that writes to the framebuffer in Ubuntu. It works beautifully: I enter the system terminal using ⇧+CTRL+F1, then start the program, and it starts writing to the framebuffer and ...
0
votes
1answer
506 views

How to improve performance of mplayer with libcaca?

I'm using mplayer and libcaca on Gentoo. My framebuffer (uvesafb) is running at 1920x1200 (I don't know how many characters that is) and mplayer has problems filling up the screen, so video and audio ...
1
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2answers
1k views

Use high resolution (same as desktop) in Linux virtual consoles

I want to use 1920x1080 in the virtual consoles, with: Debian Squeeze; proprierary ATI drivers. Switching back to the open source drivers, it works automatically, but I got no clue with these ...
1
vote
1answer
373 views

How do I instruct the kernel to use a USB keyboard and FB device as it's boot console?

I'm guessing the answer to my question is in manipulating the kernel command line. But with what arguments? (and does the kernel have it's own fonts to be used on a FB device?) The host is a ARM9 ...
21
votes
5answers
30k views

Change Linux console screen blanking behavior

How do I change the screen blanking behavior on Linux virtual terminals? For example, if I switch to a VT from X, login, and leave the system alone for 5 minutes or so, the screen will blank like a ...
2
votes
1answer
4k views

framebuffer not available. How to install the device /dev/fb/0 on Ubuntu?

I am trying to run an application that uses framebuffer on 2.6.31-14-generic #48-Ubuntu. All I need to do is to install a framebuffer device to get rid of the following error: /dev/fb/0: No such ...
4
votes
1answer
16k views

Problem setting command-line console resolution. vbeinfo in grub2 does not report all resolutions

I have a Asus EEE PC 1005P which I installed a Command-line system on using the Alternate Installer CD of Ubuntu Lucid Lynx. Altough I think this is a general linux and grub2 question. I do not have ...
0
votes
1answer
1k views

Xvfb with 32 bit color

For some machines this works, for some it doesn't. Xvfb :99 -screen 0 1280x1024x32 However, on most machines this works: Xvfb :99 -screen 0 1280x1024x24 What is the secret ingredient to getting ...
14
votes
3answers
3k views

Change Linux Console's Default Monitor

Is there any way to specify which monitor the console is displayed on in Linux? Details: I have a 3 monitor setup with 2 video cards. When I boot the computer, the BIOS displays on the PCI graphics ...