When I use dmesg I see the following lines:

allard@ubuntu-laptop-allard:~$ dmesg | grep ata1
[    1.196018] ata1: SATA max UDMA/133 abar m2048@0xc2617000 port 0xc2617100 
irq 42
[    1.515247] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    1.515449] ata1.00: supports DRM functions and may not be fully accessible
[    1.515545] ata1.00: failed to get NCQ Send/Recv Log Emask 0x1
[    1.515547] ata1.00: ATA-9: Samsung SSD 840 EVO 120GB, EXT0BB6Q, max UDMA/133
[    1.515549] ata1.00: 234441648 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[    1.515782] ata1.00: supports DRM functions and may not be fully accessible
[    1.515851] ata1.00: failed to get NCQ Send/Recv Log Emask 0x1
[    1.515854] ata1.00: configured for UDMA/133

Can anyone tell me what "failed to get NCQ Send/Recv Log Emask 0x1"
exactly means?

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https://bugs.launchpad.net/bugs/1338706

Title:
  Samsung SSD 840 failed to get NCQ Send/Recv Log Emask 0x1 failed to
  set xfermode (err_mask=0x40) on upstream kernels >= 3.12

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