Public bug reported: Starting from a single laptop monitor, I plugged in external VGA monitor. The monitor was autodetected and turned on (nice!). I moved the external monitor to the left of the laptop monitor in Settings -> Display, and the, after about 3 minutes of moving windows around between monitors, the mouse becomes extremely choppy and typing text into gnome- terminal has a 3+ second lag between typed character and showing at the prompt.
Setup and exact steps to recreate: 0. 1280x800 resolution laptop display with Intel-only graphics (Core i5 M520 @2.4), w/ Wacom capabilities. 1. Using Saucy 64bit iso daily from 27-Aug-2013 08:14, netbooted via a PXE and NFSROOT, with toram boot option. 2. Installed Mir per instructions at https://wiki.ubuntu.com/Mir/MultiMonitorTesting . Recreated here in case the linked text changes: $ sudo add-apt-repository ppa:mir-team/system-compositor-testing $ sudo apt-get update $ cat > /etc/apt/preferences.d/50-pin-mir.pref Package: * Pin: origin "private-ppa.launchpad.net" Pin-Priority: 1001 Package: * Pin: release o=LP-PPA-mir-team-system-compositor-testing Pin-Priority: 1002 ^D $ sudo apt-get dist-upgrade -y # note that because this is RAM only PXE boot instance, I did *not* reboot. $ uname -a Linux ubuntu 3.11.0-4-generic #9-Ubuntu SMP Mon Aug 26 15:21:06 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux # was necessary to execute $ sudo apt-get install unity-system-compositor $ sudo lightdm restart # this never restarted # Go to TTY (C-A-F1) $ sudo service lightdm stop # wait $ ps waux | grep lightdm # ensure it's not there $ sudo service lightdm start # this works, and I'm presented with Mir. $ ps waux | grep unity # shows unity-system-compositor 3. At the Unity shell, open Settings->Display # see only 13" Display. Also open up terminal (C-A-t) 4. Plug in VGA cord to external monitor # external monitor instantly engages, with correct 1280x1024 resolution. (Way to go!) 5. Move external monitor to left side of laptop display in the Settings->Display window. Click Apply. 6. Basically diddle around, then note the mouse movement become choppy and the aforementioned delay in text displaying in the terminal. ** Affects: unity-system-compositor (Ubuntu) Importance: Undecided Status: New ** Attachment added: "lshw -short" https://bugs.launchpad.net/bugs/1217687/+attachment/3791181/+files/hardware_profile.txt ** Package changed: xfce4-terminal (Ubuntu) => unity-system-compositor (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217687 Title: [mir] [multimonitor] mouse choppy, typing text in terminal slow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-system-compositor/+bug/1217687/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
