Thank you for reporting this bug. Could you have a look at https://wiki.ubuntu.com/X/Troubleshooting/IntelPerformance and report if any of the workarounds there improves things. Also, please verify that the device file /dev/dri/card0 exists on your system.
Thank you for reporting this bug. Could you have a look at https:/ /wiki.ubuntu. com/X/Troublesh ooting/ IntelPerformanc e and report if any of the workarounds there improves things. Also, please verify that the device file /dev/dri/card0 exists on your system.