Did they indicate if the USB-C port supports DisplayPort as an alt mode? My understanding from here (https://www.cablechick.com.au/blog/definitive-guide-to-usb-c-alternate-modes/#:~:text=%20At%20the%20...
Is that there may be no USB-C HDMI alt mode devices, so I'm hopeful that the alpha supports DisplayPort.
Should I start a new thread for the specific resolution support question? My resolution is within the bandwidth range for HDMI 1.4b, and the Intel forums seem to indicate that when a custom resolution does not work it is because the device bios has in some way prevented it.
Thank you again for your help!
You are correct about the HDMI port. The resolution issue must be a Windows driver bug and I will start a new thread.
I have booted Linux and in Linux the monitor is working at 2560x1440@60Hz over HDMI with zero fuss.
So do we believe that the USB-C port does not support thunderbolt or DisplayPort?
EDIT: There is a display port device supported through the USB-C port. I can see it in linux:
[ 14.062] (II) modeset(0): Output eDP-1 connected [ 14.062] (II) modeset(0): Output HDMI-1 connected [ 14.062] (II) modeset(0): Output DP-1 disconnected
eDP-1 is the internal LCD; HDMI-1 is obvious, DP-1 must be the USB-C displayport controller.
Here are the stats I could learn through xrandr (I have no device connected to the USB-C display port device):
DP-1 disconnected (normal left inverted right x axis y axis) Identifier: 0x44 Timestamp: 18228 Subpixel: unknown Clones: CRTCs: 0 1 2 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: Content Protection: Undesired supported: Undesired, Desired, Enabled max bpc: 12 range: (6, 12) Broadcast RGB: Automatic supported: Automatic, Full, Limited 16:235 audio: auto supported: force-dvi, off, auto, on link-status: Good supported: Good, Bad CONNECTOR_ID: 100 supported: 100 non-desktop: 0 range: (0, 1)
I use an ASUS USB-C monitor with my Galaxy Book Flex, connected via a Thunderbolt port.
I use an Inateck USB-C hub to provide split-power AC to both devices -- I expect if I had a monitor with a battery that would be unneeded & the monitor could be wired straight into the laptop, as I already do with my older Samsung Chromebooks.
The flex and the alpha are fairly different, the alpha does not support USB-C charging.
The USB-C port on the alpha does support DisplayPort over HDMI. I gave up and bought a USB-C hub with video and the HDMI connector on that hub does provide the correct resolution and refresh rate.
Seems silly that the built in HDMI port is less useful than the one that came with a $15 USB-C hub but there seems to be no interest from Samsung in updating the bios or drivers for my model to address this. I guess that's what I get for buying the cheapest of the Samsung Flex book lineup.