changing screen resolution?

[Zomzilla]

hi all,

i've recently started playing around with some builds by Hexxeh and am
amazed at the quality of the OS.

the only problem is that i cannot find a way to change the screen
resolution: nothing in the settings tab, cannot edit xorg.conf when i
drop to prompt (system is mounted read only) and when i open the
terminal thingy with ctrl+alt+T all the commands can apparently not be
found


help anyone? i'd love to get this sorted so i can start to play around
with the code :)

Zom

[Sean Paul]

On Thu, Apr 5, 2012 at 4:27 AM, Zomzilla <cjohnpr...@gmail.com> wrote:
> hi all,
>
> i've recently started playing around with some builds by Hexxeh and am
> amazed at the quality of the OS.
>
> the only problem is that i cannot find a way to change the screen
> resolution: nothing in the settings tab, cannot edit xorg.conf when i
> drop to prompt (system is mounted read only) and when i open the
> terminal thingy with ctrl+alt+T all the commands can apparently not be
> found
>

Ctrl+Alt+T drops you into crosh, from there, type "shell" to get to a
proper bash prompt. Alternatively, you can a prompt directly by
switching to VT2 (Ctrl+Alt+F2, Ctrl+Alt+F1 to get back to ui).

From there, you can remount your root partition "mount -n -o
remount,rw /" and edit the xorg.conf file or play around with xrandr,
etc..

Check out http://www.chromium.org/chromium-os/poking-around-your-chrome-os-device,
all the info is there.

Hope this helps!

Sean

>
> help anyone? i'd love to get this sorted so i can start to play around
> with the code :)
>
> Zom
>

> --
> Chromium OS discuss mailing list: chromium-...@chromium.org
> View archives, change email options, or unsubscribe:
> http://groups.google.com/a/chromium.org/group/chromium-os-discuss?hl=en

[Zomzilla]

Thanks very much; I didn't realize I would need to enter the sheet
with a command

And thanks for the link :)

[Jonathan Kliegman]

As a one off for changing resolution, once you've got a bash prompt you can run:

DISPLAY=:0 xrandr -s 1920x1200 

Or whatever resolution you want.  

[Zomzilla]

Actually I'm having some more trouble with this:

All other distro's have detected my resolution just fine, yet chromium
has put it at 1024x768

I tried editing xorg.conf, yet on reboot the changes were gone again
(I had mounted the filesystem RW)

How should I change my resolution to 1366x768?

Using a Dell laptop with ATI radon card if it helps


Oh and xrandr gives me an error( failed to get size of gamma for
output default)

[Jonathan Kliegman]

xorg.conf shouldn't reset on reboot - that seems odd. Are you sure you switched it to read-write properly and the editor was able to save?  Its probably worth double checking this - I've made this mistake in the past where the file didn't get saved like I thought it did.  

I believe I've seen some bugs in the past on monitors underreporting their resolutions but those were usually for external displays with some weird chain of cables.    If other distros are able to detect your card fine it seems like ChromiumOS should.  The only thing I can think of is if you have different drivers which are doing odd things.  I haven't done much with video drivers (well, anything) so I'm not sure of the state of that device on ChromiumOS - Hexxeh might know better.

[Zomzilla]

Well maybe I should try again; I used a couple methods to switch to RW
yet both times the editor saved; when I checked after saving the
changes were still present. Is most odd.

[Jonathan Kliegman]

Oh wait.

You're using Hexxeh's build?  I seem to recall a hack he mentioned a few months ago where he would modify the xorg.conf at boot time to do something with device detection based on what video card was in use.  But I can't recall exactly why. So its possible that his build is regenerating xorg.conf and clobbering your changes.  

I could be wrong or misremembering though - I'll see what I can find out.  I don't have a copy of his builds to check on.  You might want to look in /etc/init for any scripts that modify xorg.conf there though.

[Jonathan Kliegman]

OK - Hexxeh just confirmed he does that.  He said disabling the chromeos-lime initscript would prevent it getting modified.  I assume that file would be /etc/init/chromeos-lime.conf and you can then comment out the 'start on ...' line).

[Zomzilla]

Ok I'll sort all that out later: thanks for all the help with this,
I'll be adding this issue to my list of tweaks to make (chromeOS
graphics seems to be in a bit of a state from what I've seen)

[Daouda Williams]

Hey guys I recently downloaded chrome os, it's giving me this problem on my dell Inspiron mini 9. And also you should know this via usb thumb drive. When it boots up the screen shows up and then goes blank, maybe you guys could help  me, Its on a 800x600 resolution and my computer shows 1024x900.

[Petar Vasilev]

Hi Guys, I am having problem with setting the resolution when Chrome OS is running in VirtualBox. I am trying to use xrandr but I always get: 

Failed to get size of gamma for output default

From what I've managed to gather I need to edit xorg.conf manually but am not sure how. Any help appreciated

[Steve Pirk]

xorg.conf should be in /etc/X11. You will need to use sudo to edit it. Not sure what changes need to be made though, so hopefully the innfo you have found will give you an idea.

-- steve

--

[Petar Vasilev]

Well, the problem is I am not sure what I need to change in xorg.conf . I've been trying but failed so far.

[that_fluffy_jello]

Well, I get a "Size ....x.... not found in available modes"
I'm using a CloudReady Chromium OS Build on a VMware Workstation 12 running on a Windows 10 PC. Since installation, it's locked to 1024x768, which is bothering me! Tried changing the display settings on VMware, and still stays here. Can't go to root mode and edit xorg.conf because the chronos user always failed on logging in, password field wont let me enter any passwords anyways. Tried sudo through crosh, nope. Password! What should I do?

Any help will be welcome! thanks