raspberry pi really support 2k hdmi output?

[vzex]

Actually, after I made a lot of tests, I just couldn't let the screen show images.So I just wonder if pi really support high resolution？What I got is blank screen. I have some config of /boot/config.txt below `disable_overscan=1 framebuffer_depth=24 gpu_mem=192 framebuffer_ignore_alpha=1 start_x=1

hdmi_ignore_edid=0xa5000080 hdmi_cvt 2560 1440 50 3 0 0 1 hdmi_group=2 hdmi_mode=87 hdmi_pixel_freq_limit=300000000 hvs_priority=0x32ff max_framebuffer_width=2560 max_framebuffer_height=1440 framebuffer_width=2560 framebuffer_height=1440 config_hdmi_boost=4 hdmi_force_hotplug=1 `

and tvservice -d shows:

• HDMI:EDID version 1.3, 1 extensions, unknown aspect ratio HDMI:EDID features - videodef 0x80 !standby !suspend !active off; colour encoding:RGB444|YCbCr422; sRGB is not default colourspace; preferred format is native; does not support GTF HDMI:EDID found monitor name descriptor tag 0xfc HDMI:EDID monitor name is V_R__ HDMI:EDID found monitor S/N descriptor tag 0xff HDMI:EDID found monitor range descriptor tag 0xfd HDMI:EDID monitor range offsets: V min=0, V max=0, H min=0, H max=0 HDMI:EDID monitor range: vertical is 23-75 Hz, horizontal is 15-240 kHz, max pixel clock is 300 MHz HDMI:EDID monitor range does not support GTF HDMI:EDID failed to find a matching detail format for 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID calculated refresh rate is 50 Hz HDMI:EDID guessing the format to be 1440x2560p @50 Hz HDMI:EDID found unknown detail timing format: 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID established timing I/II bytes are 00 00 00 HDMI:EDID standard timings block x 8: 0x0000 0000 0000 0000 0000 0000 0000 0000 HDMI:EDID parsing v3 CEA extension 0 HDMI:EDID monitor support - underscan IT formats:no, basic audio:yes, yuv444:yes, yuv422:yes, #native DTD:4 HDMI:EDID failed to find a matching detail format for 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID calculated refresh rate is 50 Hz HDMI:EDID guessing the format to be 1440x2560p @50 Hz HDMI:EDID found unknown detail timing format: 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID failed to find a matching detail format for 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID calculated refresh rate is 50 Hz HDMI:EDID guessing the format to be 1440x2560p @50 Hz HDMI:EDID found unknown detail timing format: 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID failed to find a matching detail format for 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID calculated refresh rate is 50 Hz HDMI:EDID guessing the format to be 1440x2560p @50 Hz HDMI:EDID found unknown detail timing format: 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID failed to find a matching detail format for 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID calculated refresh rate is 50 Hz HDMI:EDID guessing the format to be 1440x2560p @50 Hz HDMI:EDID found unknown detail timing format: 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID failed to find a matching detail format for 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID calculated refresh rate is 50 Hz HDMI:EDID guessing the format to be 1440x2560p @50 Hz HDMI:EDID found unknown detail timing format: 1440x2560p hfp:60 hs:10 hbp:35 vfp:4 vs:2 vbp:2 pixel clock:198 MHz HDMI:EDID does not understand CEA format code 0 HDMI:EDID does not understand CEA format code 0 HDMI:EDID does not understand CEA format code 0 HDMI:EDID does not understand CEA format code 0 HDMI:EDID does not understand CEA format code 0 HDMI:EDID does not understand CEA format code 0 HDMI:EDID does not understand CEA format code 0 HDMI:EDID found audio format 2 channels PCM, sample rate: 32|44|48|88|96|176|192 kHz, sample size: 16|20|24 bits HDMI:EDID found HDMI VSDB length 6 HDMI:EDID HDMI VSDB has physical address 3.0.0.0 HDMI:EDID HDMI VSDB supports AI:yes, dual link DVI:no HDMI:EDID HDMI VSDB deep colour support - 48-bit:no 36-bit:no 30-bit:no DC_yuv444:no HDMI:EDID HDMI VSDB has no latency information HDMI:EDID adding mandatory support for DMT (4) 640x480p @ 60Hz HDMI:EDID adding mandatory support for CEA (1) 640x480p @ 60Hz HDMI:EDID filtering formats with pixel clock > 162 MHz or h. blanking > 1023 HDMI:EDID no known preferred format has been set HDMI:EDID filtering preferred group has been changed from Invalid to CEA HDMI:EDID best score mode initialised to CEA (1) 640x480p @ 60 Hz with pixel clock 25 MHz (score 0) HDMI:EDID best score mode is now CEA (1) 640x480p @ 60 Hz with pixel clock 25 MHz (score 61864) HDMI:EDID DMT mode (4) 640x480p @ 60 Hz with pixel clock 25 MHz has a score of 18432 HDMI:EDID preferred mode is updated to CEA (1) 640x480p @ 60 Hz with pixel clock 25200000 Hz HDMI:EDID has HDMI support and audio support

[WesGilster]

That seemed to be quite a high resolution for the Pi, but I can't really tell you. We've got a few Pi experts here, but you may actually want to ask your question on the Raspberry Pi forums as well. Here is a topic from the Pi forums that my help you out:

https://www.raspberrypi.org/forums/viewtopic.php?f=7&t=307

[jmkao]

It should be possible. The RPi can handle up to 4K at 15hz refresh. Choppy for desktop use, but plenty fast for printing.

Can you paste the output of tvservice -s?

[vzex]

tvservice -s state 0x120006 [DVI DMT (87) RGB full 16:9], 2560x1440 @ 50.00Hz, progressive

[WesGilster]

It looks like you need to dial back your refresh rate to 15Hz and see what happens.

[vzex]

ok,I'll make a test after printing.

[vzex]

I'm success with 2560*1440@50hz output,but when I make the Grid Screen test,the image on screen is not fullscreen.

So is there any other params need to be set ? When I's testing, I found the resolution in photo3d is this right?

my tvservice -s now : state 0x120006 [DVI DMT (87) RGB full 16:9], 2560x1440 @ 50.00Hz, progressive

[vzex]

I think it's maybe a rotate problem, I'll check it

[WesGilster]

That doesn't look right. When you calibrate the screen those values will be detected from your hardware. Otherwise you can override those settings in the printers page here:

[kloknibor]

it is totally possible. We have got 1K (and lower) 2.5K and 4K screens to work around here! We had to set the things in boot/config.txt right our settings for the 2.5K screen were :

overscan_left=0 overscan_right=0 overscan_top=0 overscan_bottom=0

disable_overscan=1

hdmi_drive=1 hdmi_ignore_edid=0xa5000080 hdmi_group=2 hdmi_mode=87

60Hz

hdmi_pixel_freq_limit=206000000 hdmi_timings=2048 0 150 5 5 1536 0 3 1 9 0 0 0 60 0 205210000 1 max_framebuffer_width=2048 max_framebuffer_height=1536 display_rotate=0 framebuffer_width=2048 framebuffer_height=1536

[vzex]

@kloknibor Actually my config looks the same as your's, but i don't know how to set the hdmi_timings, even I 've got the datasheet - -!. I can't figure out which argument cause the screen just show 1/2

[vzex]

problem solved