External USB C Monitor not working
#23
(11-13-2020, 12:44 PM)Laksh515 Wrote: i've also tried two different adaptors one which comes with the pinephone but that also doesn't work.

That is *guaranteed* not to work: there are different signals that can be carried over a USB-C port.
- Pinebook Pro can only exclusively send its video out as Display Port (DP)
- Pinephone will exclusively send its video out as HDMI (edit: I was wrong, see maxjrh's answer, there's a HDMI-to-DP converter)
(- And for the record, Apple Macs and some Intel-based laptops will output Thunderbird, which is a mix of Display port and PCIe multiplexed on the same connector).

A USB-C video out adapter that you have for either is guaranteed to not work with the other.
(Unless you find a special dock that can accept both DP and HDMI)

For the Pinebook Pro, you specifically need a dock that works with DP (and features it's own internal DP to HDMI converter if you need).

(11-13-2020, 12:44 PM)Laksh515 Wrote: but USB C to HDMI no signal recognized by the monitor.

For the monitor to work, you need:
- a dock that is designed to work with Dispaly Port signals as that's what the Pinebook Pro's USB-C emits. (See above) - check no-name asian docks that list Mac Books and PC laptops on their compatibility list. The Docking Deck by Pine64 will also support the correct standard.
- a video mode on the Pinebook Pro that isn't to high resolution/high refresh rate. (4k60p would require using 4 lanes for DP. Whereas most USB-C Docks expect 2 lanes only used for DP and the remaining 2 lanes used to USB3) If you have a 4K monitor, try setting a lower refresh rate in the video-output setting of your Linux.
- trying the other way around (Pinebook Pro has trouble negociating which 2 lanes are used for what)
- luck and trial and errors: the drivers are still actively being developed and sometime fail (maybe you're just running a bad version of the kernel (maybe it will get fixed in 5.9.6 or some other update), or maybe you just hit a weird bug in the order in which you plugged everything). With the Docking Deck being released soon, I expect things to get better.
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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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