Hi, since I updated the kde 4 to plasma kde 5, the system sometimes freeze... maykel  maykel-arch  ~  Downloads  $  dmesg | grep -i error [ 2.568585] ACPI Error: Method parse/execution failed [\_SB_.PCI0.GFX0._DSM] (Node ffff8802264acb40), AE_AML_PACKAGE_LIMIT (20150619/psparse-536) [ 2.570201] ACPI Error: Method parse/execution failed [\_SB_.PCI0.GFX0._DSM] (Node ffff8802264acb40), AE_AML_PACKAGE_LIMIT (20150619/psparse-536) [ 2.570208] ACPI Error: Method parse/execution failed [\_SB_.PCI0.PEG0.PEGP._DSM] (Node ffff8802264c52f8), AE_AML_PACKAGE_LIMIT (20150619/psparse-536) [ 2.701980] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A [ 2.701998] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun Why is this?