External USB C Monitor not working
#21
(10-18-2020, 08:50 PM)wdt Wrote: Err, did you actually do this?
sudo pacman -Syyu linux-pinebookpro linux-pinebookpro-headers
A normal update does NOT install this, must be explicitly installed
Yes, I did it. It is a downgrade, not an upgrade. If someone install these, they will NOT BE UPDATED with a normal Manjaro release update, they would have to explicitly install linux and linux-headers, then reboot, check that HDMI is not working again, then install again linux-pinebookpro and linux-pinebookpro-headers. After 20.10 I had to reinstall linux-pinebookpro from the root account, because KDE didn't start. The Linux experience Big Grin
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#22
Hi, I also have a similar problem, just got the pinebook pro with Manjaro, external keyboard and mouse plug & Play no problem but USB C to HDMI no signal recognized by the monitor.

Tried flipping the USBC plug, tried plugging in the cables before powering up, i've tried two different monitors 1080p and 1440p i've also tried two different adaptors one which comes with the pinephone but that also doesn't work.

So I don't know who should I be looking at, installing drivers?

Im new to Linux.

Kernel 5.9.1-3
KDE Plasma 5.20.1
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#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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#24
This is incorrect. HDMI over USB-C alt-mode is a completely dead standard. Nowadays it is virtually impossible to find devices or cables that support it.
(11-15-2020, 07:30 PM)DrYak Wrote: - Pinephone will exclusively send its video out as HDMI
The processor on the pinephone does that, but the pinephone includes a converter chip that turns it into a DP alt-mode signal.

@Laksh515 I recommend you to read the release posts on the manjaro forum (https://forum.manjaro.org/c/arm/100)
HDMI not working is a known issue of the mainline kernel. It is recommended to install linux-pinebookpro if you need that feature.
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#25
(08-24-2020, 01:33 PM)wdt Wrote: You didn't say,,,, manjaro???.. A known regression
sudo pacman -Syyu linux-pinebookpro linux-pinebookpro-headers
to get tsy's kernel

Went to try, but this gives me pause:

Code:
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...
:: linux-pinebookpro and linux are in conflict. Remove linux? [y/N]

Safe to proceed?
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#26
(11-13-2020, 12:44 PM)Laksh515 Wrote: Hi, I also have a similar problem, just got the pinebook pro with Manjaro, external keyboard and mouse plug & Play no problem but USB C to HDMI no signal recognized by the monitor.

Tried flipping the USBC plug, tried plugging in the cables before powering up, i've tried two different monitors 1080p and 1440p i've also tried two different adaptors one which comes with the pinephone but that also doesn't work.

So I don't know who should I be looking at, installing drivers?

Im new to Linux.

Kernel 5.9.1-3
KDE Plasma 5.20.1

Did you get this resolved? I've got the same problem.
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