Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Multiple monitor issue

  • 14-10-2011 6:01pm
    #1
    oscarBravo
    Technology & Internet Moderators Posts: 28,842 Mod ✭✭✭✭


    It finally occurred to me today to try plugging a second monitor into the VGA port on my PC (main monitor is on the DVI port), and presto! it shows up as a separate monitor on Ubuntu.

    Unfortunately, if I configure for multiple screens, it goes horribly pearshaped. Performance gets manky - dragging a window happens at roughly 1fps, for example - although small updates seem to happen quickly enough.

    If something affects the entire screen (say I hit the logo key to bring up the dashboard (running GNOME shell)) the whole screen is replaced by diagonal tearing, but as individual windows update, they re-paint properly, albeit slowly.

    The GPU is an Intel 82Q35 integrated graphics controller. Maybe it just can't hack doing 3D full-screen on two displays?

    Any ideas?


Comments

  • #2
    oscarBravo
    Technology & Internet Moderators Posts: 28,842 Mod ✭✭✭✭oscarBravo


    Bah. Solved my own issue.
    oscarBravo wrote: »
    Maybe it just can't hack doing 3D full-screen on two displays?
    The combined width of the displays exceeded 2048 pixels, which the GPU can't hack. I've rearranged the desktops so that one is above the other - it's not as intuitive, but it works.


  • #3
    Galen
    Closed Accounts Posts: 664 ✭✭✭Galen


    Was that Ubuntu 11.04? I spent all day yesterday fixing assorted faults in Ubuntu 11.10. Canonical have done a nice job with Unity in Ubuntu 11.10 (at least they've with ATI, I haven't tried with one of my nvidia cards). It's not bad at all - it just might be good to switch from Kubuntu.


  • #4
    oscarBravo
    Technology & Internet Moderators Posts: 28,842 Mod ✭✭✭✭oscarBravo


    The issue was the same before and after an upgrade from 11.04 to 11.10.


  • #5
    Galen
    Closed Accounts Posts: 664 ✭✭✭Galen


    I've never trusted OS upgrades since windoze 98.


  • #6
    Khannie
    Registered Users, Registered Users 2 Posts: 37,485 ✭✭✭✭Khannie


    Is that problem down to the amount of RAM you have assigned in the bios? You might be able to get the wider desktop if you bump it up.


  • Advertisement
  • #7
    oscarBravo
    Technology & Internet Moderators Posts: 28,842 Mod ✭✭✭✭oscarBravo


    I'll check that out, cheers Khannie.


  • #8
    oscarBravo
    Technology & Internet Moderators Posts: 28,842 Mod ✭✭✭✭oscarBravo


    The video RAM is maxed out already, but it seems to be a driver limitation: it can do a 4096x4096 virtual desktop, but once it goes over 2048x2048 it turns off direct rendering.


Advertisement