I have a problem with running Radeon HD 8490 video card in Ubuntu 14.04. I am trying to set up dual monitors so here are my problems. When I go to System Settings - Software & Updates - Additional Drivers, there are 3 available drivers for my video card. The default selection is " X.OrgXServer - AMD/ATI dispay driver wrapper from xserver-xorg-video-ati (open source,tested) ". When I use this driver, I have to monitors but the keyboard has considerable lagging problems. So I switched to the proprietary driver " Video driver for AMD graphic accelerators from fglrx (proprietary) ". The keyboard operates correctly now and I still have two monitors, but this driver produces considerable lag in the mouse. I tried the solution presented here Mouse lag after upgrading to Ubuntu 14.04 that said to run "CompizConfigSettingsManager" and uncheck "sync with VBlank". This suggestion didn't help. So I switched to the third available driver " Video driver for AMD graphic accelerators from fglrx-updates (proprietary) ". The keyboard and mouse now function properly but my second monitor is not recognized. So here is the summary:
- Open Source Driver ---> lagging keyboard
- Proprietary Driver ---> lagging mouse
- Proprietary Driver Updates ---> only 1 monitor
And suggestions on how to fix these issues? I'm not particular about which driver I use, just so long as nothing lags and I have 2 monitors. Thank you all.
Update: 1/14/2015 I updated my Bios Version from A03 to A08. Now, the keyboard is always fine. When using the Open Source Driver, I have two screens but the mouse lags. When I use the Proprietary Driver or the Proprietary Driver Updates, the mouse functions fine, but I only have 1 monitor.