Hi list, I've installed C7 1511 (kernel 3.10.x) on a skylake mother board with i3-6100. I know about skylake problems. For the iGPU I've used i915.preliminary_support and ok. Some days ago, I get different strange error on this machine. When screensaver starts or when monitor will be in energy saving, if I try to get access to the system I get different strange behaviour and can't use my machine. To solve this, I've disabled monitor power saving from kde. Yesterday, I've powered off this machine through an ssh session an system won't shut down and get error like "shutdown was delayed for 120 seconds..." but I can't supply information about this last problem. In my dmesg I get: [ 0.000000] ACPI Error: Gpe0Block - 32-bit FADT register is too long (32 bytes, 256 bits) to convert to GAS struct - 255 bits max, truncating (20130517/tbfadt-202) [ 0.000000] ACPI: IRQ0 used by override. [ 0.000000] ACPI: IRQ9 used by override. [ 0.000000] spurious 8259A interrupt: IRQ7. [ 0.014754] ACPI Error: [\_SB_.PCI0.XHC_.RHUB.HS11] Namespace lookup failure, AE_NOT_FOUND (20130517/dswload-194) [ 0.117596] ACPI: Using IOAPIC for interrupt routing [ 0.127508] acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM [ 0.135161] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 10 *11 12 14 15) [ 0.135193] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 10 11 12 14 15) *0 [ 0.135226] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 *10 11 12 14 15) [ 0.135257] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 10 11 12 14 *15) [ 0.135288] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 10 11 12 14 15) *0 [ 0.135320] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 10 11 12 14 15) *0 [ 0.135351] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 10 11 12 14 15) *0 [ 0.135381] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 10 11 12 14 15) *0 [ 0.419906] ACPI Error: No object attached to node ffff880135b16078 (20130517/exresnte-127) [ 0.419908] ACPI Error: Method parse/execution failed [\_SB_.PCI0.XHC_.RHUB.HS01._PLD] (Node ffff880135b160c8), AE_AML_NO_OPERAND (20130517/psparse-536) [ 0.420267] ACPI Error: No object attached to node ffff880135b16078 (20130517/exresnte-127) [ 0.420268] ACPI Error: Method parse/execution failed [\_SB_.PCI0.XHC_.RHUB.HS02._PLD] (Node ffff880135b16118), AE_AML_NO_OPERAND (20130517/psparse-536) [ 0.420591] ACPI Error: No object attached to node ffff880135b16078 (20130517/exresnte-127) [ 0.420592] ACPI Error: Method parse/execution failed [\_SB_.PCI0.XHC_.RHUB.HS03._PLD] (Node ffff880135b16168), AE_AML_NO_OPERAND (20130517/psparse-536) [ 0.420912] ACPI Error: No object attached to node ffff880135b16078 (20130517/exresnte-127) [ 0.420913] ACPI Error: Method parse/execution failed [\_SB_.PCI0.XHC_.RHUB.HS04._PLD] (Node ffff880135b161b8), AE_AML_NO_OPERAND (20130517/psparse-536) [ 0.421260] ACPI Error: No object attached to node ffff880135b16078 (20130517/exresnte-127) [ 0.421261] ACPI Error: Method parse/execution failed [\_SB_.PCI0.XHC_.RHUB.HS05._PLD] (Node ffff880135b16208), AE_AML_NO_OPERAND (20130517/psparse-536) [ 0.421582] ACPI Error: No object attached to node ffff880135b16078 (20130517/exresnte-127) [ 0.421584] ACPI Error: Method parse/execution failed [\_SB_.PCI0.XHC_.RHUB.HS06._PLD] (Node ffff880135b16258), AE_AML_NO_OPERAND (20130517/psparse-536) [ 0.421904] ACPI Error: No object attached to node ffff880135b16078 (20130517/exresnte-127) [ 0.421905] ACPI Error: Method parse/execution failed [\_SB_.PCI0.XHC_.RHUB.HS07._PLD] (Node ffff880135b162a8), AE_AML_NO_OPERAND (20130517/psparse-536) [ 0.422251] ACPI Error: No object attached to node ffff880135b16078 (20130517/exresnte-127) [ 0.422252] ACPI Error: Method parse/execution failed [\_SB_.PCI0.XHC_.RHUB.HS08._PLD] (Node ffff880135b162f8), AE_AML_NO_OPERAND (20130517/psparse-536) [ 0.422573] ACPI Error: No object attached to node ffff880135b16078 (20130517/exresnte-127) [ 0.422574] ACPI Error: Method parse/execution failed [\_SB_.PCI0.XHC_.RHUB.HS09._PLD] (Node ffff880135b16348), AE_AML_NO_OPERAND (20130517/psparse-536) [ 0.422893] ACPI Error: No object attached to node ffff880135b16078 (20130517/exresnte-127) [ 0.422895] ACPI Error: Method parse/execution failed [\_SB_.PCI0.XHC_.RHUB.HS10._PLD] (Node ffff880135b16398), AE_AML_NO_OPERAND (20130517/psparse-536) How I can solve/mitigate those problems/errors? Thanks in advance.