After upgrade I have problem with 2560x1440x60hz resolution

[DidaJI]

After rpi-update Jessie (monday) me stopped working HDMI resolution 2560x1440 at 60 Hz.

I use this one settings in config.txt:

disable_overscan=1
init_emmc_clock=100000000
framebuffer_swap=0
hdmi_group=2
hdmi_mode=87
hdmi_cvt=2560 1440 60 3 0 0 1
max_framebuffer_width=2560
max_framebuffer_height=1440
hdmi_pixel_freq_limit=400000000

Now I must set only 41Hz (hdmi_cvt=2560 1440 41 3 0 0 1), with higher frequency that does not work.

Does anyone know how to fix it?

[dom]

Can you test with latest rpi-update firmware? Hopefully this is fixed.

[DidaJI]

Thank you very much again Dom, after last rpi-update it's alright.
Now again I'm going on resolution 2560x1440x60Hz.

[raspberrybeginner]

Hello, I have a similar problem.
My monitor is a Lenovo LT3053p with 2560x1600 @60Hz and my RaspberryPi is v3.
My config.txt is the following and the Monitor shows two black bars, left and right.

hdmi_cvt=2560 1600 60 5
hdmi_drive=2
hdmi_group=2
hdmi_mode=87
hdmi_force_hotplug=1
config_hdmi_boost=4
#overscan_left=24
#overscan_right=24
#overscan_top=16
#overscan_bottom=16
disable_overscan=1
max_framebuffer_width=2560
max_framebuffer_height=1600
framebuffer_width=2560
framebuffer_height=1600
#hdmi_pixel_freq_limit=260000000
arm_freq=900
gpu_mem=512

I allready tried different hdmi_modes but without any changes, I also changed the Hz to 75 or 50 or 41 etc. Please help me.

[dom]

@raspberrybeginner

Running "sudo vcdbg log msg" provides a clue:

Code: Select all

000694.556: hdmi: HDMI:EDID filtering out DMT format: 2560x1600p @ 60 Hz (87) with pixel clock 348 MHz and hfp:192 hs:280 hbp:472

The very high resolution requires an overclock of pixel frequency.
Try adding (without the comment "#")

Code: Select all

hdmi_pixel_freq_limit=350000000

[cwacha]

Just wanted to mention that I got this to work on my Raspberry Pi 3. I added the following lines to my vanilla installation:

/boot/config.txt

Code: Select all

hdmi_mode=87 # (was 82 previously)
hdmi_cvt=2560 1440 60 3 0 0 1
hdmi_pixel_freq_limit=350000000

I don't care for the framebuffer size so I left away the following settings:

Code: Select all

framebuffer_width=2560
framebuffer_height=1440

Works like a charm on my HP ZDisplay Z27i.

Cheers
Clemens