dmesg error
0.888288] ACPI Error: [DSSP] Namespace lookup failure, AE_NOT_FOUND (20140424/psargs-359)
[    0.888291] ACPI Error: Method parse/execution failed [\_SB_.PCI0.SAT0.SPT5._GTF] (Node ffff88021f075400), AE_NOT_FOUND (20140424/psparse-536)
[    0.888298] ata6.00: ATAPI: HL-DT-ST DVDRAM GH24NSD1, LG00, max UDMA/133
[    0.888350] ACPI Error: [DSSP] Namespace lookup failure, AE_NOT_FOUND (20140424/psargs-359)
[    0.888353] ACPI Error: Method parse/execution failed [\_SB_.PCI0.SAT0.SPT4._GTF] (Node ffff88021f075478), AE_NOT_FOUND (20140424/psparse-536)