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by Demodude123
Tue Jul 21, 2015 1:07 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

I've got the console successfully running at 3840x2160, but X seems to run at a lower res; xrandr reports 2400x1200. Do I need to change any X configurations to make this work? I'm on raspbian on an RPi2 Cheers, vik These are all the settings I added to config.txt when I had this working under whee...
by Demodude123
Mon Jun 22, 2015 6:37 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

I remember seeing this done a long time ago in the Raspberry Pi blog. I found these links:

https://www.raspberrypi.org/video-wall/

http://www.ccfe.ac.uk/news_detail.aspx?id=213

Software:

http://www.piwall.co.uk/information/installation
by Demodude123
Fri Feb 20, 2015 3:16 pm
Forum: General discussion
Topic: 4k on the Pi
Replies: 13
Views: 13405

Re: 4k on the Pi

This is just me getting the desktop to output 4k on a Raspberry Pi Model B. Playing back 4k video on a Pi seems very unlikely to be possible.
by Demodude123
Fri Sep 05, 2014 7:45 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

I've been trying this with my Seiki 39in. TV. The TV itself does state that it's in [email protected] mode, but the framebuffer still maxes out at 1920x1200. Using fbset to try and set it to anything below 1920x1200 works fine, but trying to set it higher causes the screen to become black, of which so...
by Demodude123
Tue Aug 19, 2014 4:53 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

I did not have it, but when I tried it I got nothing. Sound still works in 1920x1080 though.
by Demodude123
Tue Aug 19, 2014 3:16 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

Ok, I have Openelec running in 4k at 18Hz (not overclocked), but I noticed I wasn't getting any sound through HDMI to my TV. I went back down to 1920x1080 and sound came out of my television. I also tried forcing audio in the config file to the TV, but that attempt was unsuccessful. Is there any rea...
by Demodude123
Tue Jul 29, 2014 5:45 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

Ok, so getting back into the swing of things with 4k, I was trying to get omxplayer to run a sample video (Skyfall Trailer) at 4K off of an SD card. Omxplayer realized the resolution of the video being 4k, and the videos framerate, but stopped there. It can play another sample video I had at 1280x53...
by Demodude123
Fri Jun 27, 2014 10:13 am
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

That is for HDMI revisions before 1.4. On HDMI 1.4 and more , 4K support is not mandatory but it's possible. Ok, I wasn't sure if 4k TV's with HDMI 2.0 had come out yet, but I see they have. Thanks for clarifying that. When I was testing with 4k, I remember reading a lot of articles saying anything...
by Demodude123
Thu Jun 26, 2014 9:51 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

At turbo mode and increasing the pixel clock limit, I got [email protected]!!! But I view that the VPU is running at full tilt. Cool. If someone want to make a Youtube video of the Pi doing some desktop stuff at 4K we'd be interested. Might make a blog post. Correct me if I'm wrong, but I thought that HDMI w...
by Demodude123
Thu Jun 19, 2014 6:32 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

Great! I did a scrot to get a screenshot of X, but much to my surprise, the resolution only came out to be @ 3792 x 2128. I'm questioning if the issue is that of scrots capturing or maybe it really isn't truly 4k. Add: disable_overscan=1 to config.txt to get 3840x2160 (which is full 4K). I see, I d...
by Demodude123
Thu Jun 19, 2014 1:31 am
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

Great! A picture of X running at 4K would be good to see (or even a YouTube video). I did a scrot to get a screenshot of X, but much to my surprise, the resolution only came out to be @ 3792 x 2128. I'm questioning if the issue is that of scrots capturing or maybe it really isn't truly 4k. http://i...
by Demodude123
Wed Jun 18, 2014 11:49 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

OpenELEC 4.0.5 should include this firmware, so you can try the config.txt settings. However I'm more interested in raspbian. Run: sudo rpi-update && sudo reboot on your raspbian install, after adding settings to config.txt and see if you get a usable framebuffer. Realistically, video decode and 3D...
by Demodude123
Mon Jun 16, 2014 10:30 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

Can you try running rpi-update, and include this in config.txt hdmi_group=2 hdmi_mode=87 hdmi_cvt 3840 2160 24 max_framebuffer_width=3840 max_framebuffer_height=2160 hdmi_pixel_freq_limit=400000000 If 24Hz doesn't work, then try 15. I don't have a display that can handle this, but I get a big frame...
by Demodude123
Wed Jun 11, 2014 7:43 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

Ok, I tried out 4k @ 30Hz on Openelec with and without hdmi_pixel_freq_limit=400000000. Without it, I got an output of 1920x1080 @ 24Hz and with it I got no picture past the opening logo, which always appears at 1920x1080 @ 60Hz. It is very weird how it is coming up with 24Hz when I enter 30Hz and 1...
by Demodude123
Wed Jun 11, 2014 7:30 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Re: Raspberry Pi and 4k @ 15Hz

Interesting. Can you get 3840 x 2160 @ 24Hz? You may need to increase the hdmi pixel clock limit. It defaults to 163682864. Perhaps try hdmi_pixel_freq_limit=400000000 I think the framebuffer resolution gets limited to something like 1920x1200, although it may be possible to remove that limit. What...
by Demodude123
Wed Jun 11, 2014 6:21 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156763

Raspberry Pi and 4k @ 15Hz

Hello Raspberry Pi Forum members! I have managed to get 3840 x 2160 (4k x 2k) at 15Hz on a Seiki E50UY04 working under two distributions on the Raspberry Pi :D . (Latest Wheezy/Openelec). The television shows it is receiving this resolution and hertz level, and it looks very crisp. The only other go...

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