External USB C Monitor not working
#27
I have Pinebook Pro connected to LG 27UD88-W monitor via USB-C to DisplayPort cable. I'm running Manjaro ARM 21.06 (Linux kernel 5.12) with Sway WM. The problem is that I can't run 4K @ 30Hz properly (right 1/3 of the screen is distorted). FullHD (1920 x 1080) and WQHD (2560 x 1440) works just fine. I have also tested X11 based Linux distros and the issue is the same. Anybody had luck to run 4K @ 30Hz video output on the external monitor?

This is the similiar thread, but it is closed.

I will be more than happy to provide more details.

Code:
$ dmesg | grep cdn-dp
[    5.395293] cdn-dp fec00000.dp: Direct firmware load for rockchip/dptx.bin failed with error -2
[    5.395302] cdn-dp fec00000.dp: Falling back to sysfs fallback for: rockchip/dptx.bin
[   69.610270] cdn-dp fec00000.dp: [drm:cdn_dp_request_firmware [rockchipdrm]] *ERROR* failed to request firmware: -11
[  101.919603] cdn-dp fec00000.dp: [drm:cdn_dp_pd_event_work [rockchipdrm]] Connected, not enabled. Enabling cdn
[  549.569829] cdn-dp fec00000.dp: [drm:cdn_dp_check_sink_connection [rockchipdrm]] *ERROR* Get sink capability timed out
[  549.570998] cdn-dp fec00000.dp: [drm:cdn_dp_encoder_enable [rockchipdrm]] *ERROR* Failed to enable encoder -19
  Reply


Messages In This Thread
External USB C Monitor not working - by altacus - 06-11-2020, 08:56 PM
RE: External USB C Monitor not working - by v-man - 06-16-2020, 10:35 AM
RE: External USB C Monitor not working - by DrYak - 06-16-2020, 01:24 PM
RE: External USB C Monitor not working - by v-man - 06-16-2020, 02:20 PM
RE: External USB C Monitor not working - by tllim - 06-26-2020, 01:41 PM
RE: External USB C Monitor not working - by wdt - 08-24-2020, 01:33 PM
RE: External USB C Monitor not working - by wdt - 09-03-2020, 10:53 AM
RE: External USB C Monitor not working - by wdt - 10-18-2020, 08:50 PM
RE: External USB C Monitor not working - by DrYak - 11-15-2020, 07:30 PM
RE: External USB C Monitor not working - by jkm - 06-29-2021, 10:34 AM
RE: External USB C Monitor not working - by jkm - 08-02-2021, 07:40 AM

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