Chromebox how to fix resolution output ?

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  • Question
  • Updated 3 years ago
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  • (Edited)
EDIT MARCH 19, 2018: Please note that all conversations related to Chrome OS in this Community should be considered obsolete and out of date. As announced in our new Community, Rise Vision is adding support for Chrome OS with a new version of Rise Player for Chrome OS.

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Presentation resolution 1280*720, ChromeBox resolution in Kiosk mode sometime, after a reboot, change to 1920x1080 (maximum supported by monitor).
Is there a system to fix output resolution ?
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Alberto Bonaldo

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Posted 4 years ago

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Blake Freeman, Official Rep

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Alberto,

This sounds like it may be an issue with your chromebox, chromeOS, or your display. You may want to contact your hardware manufacturer for a resolution. 
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Daniel Vosburg Jr.

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Alberto,

Have you had any luck finding out the issue? Our ASUS Chromeboxes with ChromeOS 42 keeps on resetting their resolutions. We powerwashed them back to ChromeOS 41 to keep them from losing their display settings but it is less then ideal. Any information you come across would be great. 
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Alberto Bonaldo

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I have no time to test this problem..., without remote control I have to do 100KM by car to change resolution... I create a new presentation @ 1920 X 1080 and now hope that client don't change monitor with a new 4K :-)
I will buy another Asus Chromeboxes and test this issue... 
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SIFA SUPPORT

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We have the same issue. Using an asus chromebox with 4 NEC display as a video wall (2x2). it's been running for months as a 4K (3840x2160) monitor plugged.

If we configure-it as 4K monitor, it works fine. But after a reboot, it does not seem to remember our prefered resolution and revet back to the default 1920x1080. Going into kiosk mode has the same effect.

Is there a way to force the resolution in chromeos ?
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Tobias Johansson

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Im searching for a fix regarding this problem as well! 
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Blake Freeman, Official Rep

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SIFA & Tobias,

How does this function when in non-kiosk mode? Does the resolution appear correctly after a reboot?
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George Greene

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Same issue with an Asus Chromebox M004U on a single LG monitor running 1920x1080. It was running fine at 1920 x 1080 for a week or so and one day it decided to just switch to 1366 x 768 -at least that was what was reported in the Risevision edit/displays screen. My user reported that the presentation (made at 1920x1080) had white around it, which would make sense if the Chromebox decided it wanted to put out 1366 x 768 and the TV letter boxed it automatically.  I rebooted the Chromebox from my remote location using the reboot button in the display properties (nice feature BTW) and the user said everything was now fine. Wonderful, but what worries me is that the problem may come back.

What I have not been able to get from the forum posts I've visited is exactly how all these things talk together. I'm guessing that I set the monitor's default resolution in it's menu and set the ChromeBox to 1920x1080 (it defaulted to this out of the box). It seems the Chromebox then reports its output resolution back to the Risevision edit app. Does all that sound right? Do the TV and Chromebox communicate about resolution like PCs do with their monitors? (I.e., PCs see a low res monitor and automatically go to  low res off the graphics card on boot.)


Is there a way to force the Chromebox (or the Risevision app perhaps) to always default to 1920x1080? Is that the solution ya think?
(Edited)
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Thierry Masson

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I've similair issue with the RiseVision client reporting a wrong HDMI resolution after a reboot (scheduled each night). 

The normal resolution is full HD (1920x1080) but after a reboot, the RiseVison player detects a lower resolution (1366x768).

THis may come perhaps from the fact that during the night, the TV screen is powered off. I suppose that when the Chromebox (HP) reboots during the night, the RiseVision client can not then detect the resolution and swtich back to  1366x768.

However :
- why 1366x768?
- Should'nt the RiseVision client refresh the HDMI resolution once the screen is powerd-on?

The issue is that when the screen is powered on in the morning, the presentation does not display correctly (display of course at 1366x768 on a 1920x1080 area) . I need to reboot the Chromebox with the TV screen powered on to get back the right resolution. A simple RiseVision client reboot is not sufficient.
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Colin McGlynn

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I am experiencing the exact same issue as @Thierry Mason and I'm not sure how to proceed.
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Justin, Employee

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Colin,

Does your LCD power off at any point during the day? (i.e. a power schedule). Does rebooting the Chromebox correct the resolution?

Justin
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Colin McGlynn

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Yes, my LCD TV powered off during the night.  Rebooting the device with the LCD turned on does solve the issue.  Is there any way to save the resolution setting?  We have over 100 devices deployed around the country, so  a daily manual reset isn't viable.
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Justin, Employee

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Colin,

The only time I've seen this happen is if the LCD turns off for an extended period of time, while the player continues to run. If a power schedule is setup on the LCD, disabling that will likely keep this from happening. We also have users that will setup a reboot of the media player AFTER the LCD's power schedule has ended. So that the player reboots while the LCD is on and the resolution is correct.

Justin
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Colin McGlynn

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Some of our clients turn off their TV's overnight, it sounds like we need to ensure that the device doesn't reboot during that period of time.
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Samuel Hartman

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To those for whom a reboot solves the problem: invest in some of these - dual plug digital timer:

http://www.amazon.com/Hydrofarm-TM01715D-7-Day-Digital-Program/dp/B001BPOBTY/ref=sr_1_1?s=lawn-garde...

Reboot both the box and TV at the same time on schedule.
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Sanjay Kaler

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I have been facing this issue on couple of devices (out of 16). All our devices were configured and deployed in the same way so it is something to do with individual TV usage / settings. We use Chrome device management so can take screenshots remotely and have verified the issue.

Having gone through various forums, i will try to summarise a potential resolutions here. Please note that this may or may not work in your case.

1) This forum suggests it was Chrome OS related issue (Issue #482954) and is probably fixed in version 44. However all our devices are on the same OS version and except a few remaining devices always have same resolution either 1920x1080 or 1360x768 so i rule this out.

2) From another discussion forum, make sure that you connect Chromebox to TV using HDMI-HDMI cable or VGA-VGA, a cross cable HDMI-VGA could be an issue.

3) Login to ChromeOS and set the desired display at OS level. I am currently testing it on a connected TV and will let you know if it worked for us.
This may not be feasible in a situation where you initially setup the device by connecting to a monitor and later hand it over to a supplier to install at remote site. Supplier doesn't have access to login to ChromeOS and set the available screen resolutions.

4) From the discussion above, it appears that if the TV is switched off and box is restarted (or scheduled restart), it may pick up a different screen resolution. Can Rise Vision support or someone else confirm this?
I tend to believe this could be happening at the sites where this issue is occurring.

if i missed something, please add your comments below.

I am very keen to diagnose this issue and come up with a proper resolution.
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Sanjay Kaler

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Tried point (3) mentioned above but display went back to 1366x768 after scheduled start at 3 am this morning.

I don't have a spare device to try (4) so can somebody confirm if this could be the case?

Thanks for your help.
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Sanjay Kaler

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Ok i have confirmed that the issue occurs when the TV is switched off and the Chromebox is restarted - it would go back from 1920x1080 to 1360x768. 

Here are technical details.
Player Version: RisePlayerPackagedApp 15.8.20.6847
Viewer Version: 1-06-201508241958
Installed Browser:Chrome 44.0.2403.156

Now as long as TV is switched off, it doesn't matter what display size Chromebox is using as no one will be watching the content. However this situation is not easy to confirm as the Rise Vision app would show green dot as long as Chromebox is up and running.

So i had to call the local contact to confirm that TV is indeed switched off and asked him to switch it on.

As soon as TV came online, the display refreshed to correct size 1920x1080 without having to restart the Chromebox. Yet to confirm if this is always the case or we have to sometime manually restart the box.

Interestingly we have another display on the same site with the same Chromebox and Rise Vision specs but different TV. This TV always display 1920x1080 even when TV is switched off and box is restarted.

So will have to investigate this bit more.