CrunchBang Linux

keekeejeejee

New Member

Registered: 2014-03-19

Posts: 5

Undetected external monitor with Acer Aspire 751h

Howdy all. I've got an Acer Aspire 751 11.6 inch netbook running Waldorf. All is well, but my external monitor is giving me some trouble. It isn't detected in the visual display settings tool, and its output is either teeny-tiny and surrounded by visual noise or stretched out and only showing part of the total output shown on the netbook's screen.

xrandr output is the same whether the external monitor is plugged in or not:

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1366 x 768, current 1366 x 768, maximum 1366 x 768
default connected 1366x768+0+0 0mm x 0mm
   1366x768        0.0* 
  1024x768_60.00 (0x1a2)   63.5MHz
        h: width  1024 start 1072 end 1176 total 1328 skew    0 clock   47.8KHz
        v: height  768 start  771 end  775 total  798           clock   59.9Hz

I've been all over some of the other threads on this site about monitor issues and troubles with xrandr, but to no avail. I've gotten the "Failed to get size of gamma for output default" message in response to the various commands I've seen suggested. Any help would be much appreciated because I'll be doing a presentation in a few weeks in which it'll be important that I be able to use an external display. It's bedtime here in the states, so I'll be checking back tomorrow for responses. Thanks!

keekeejeejee

New Member

Registered: 2014-03-19

Posts: 5

Re: Undetected external monitor with Acer Aspire 751h

Although I'm relatively new, at least to xrandr and this type of hardware problem, I'm experienced enough with Linux and the command line to run and understand potentially helpfully commands, and to open up and work on configuration files; I'm just not sure where to start for this issue. Are there any commands I could run even to get a little more information on the problem?

(It's morning now, and I'll be checking back regularly.)

LinuxLearner

Member

From: Southampton

Registered: 2014-03-02

Posts: 12

Re: Undetected external monitor with Acer Aspire 751h

Hi,

I had a similar issue a while ago on Ubuntu (another Debian based Linux distro), you might try what worked for me 
Note: If you get zero output on the external screen try switching the output on the laptop (on my Acer Aspire 5720 it is <Fn & F5/F6>

https://lists.ubuntu.com/archives/ubunt … 34769.html
A link to the helpful guys on Ubuntu users who pointed me in the right direction!!

Hope this helps 

LinuxLearner

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Every time I learn somthing new something old drops out 
<Homer J Simpson>