$ sudo dmidecode -s system-product-name
MacBookPro11,5
$ uname -a
Linux macbook-nkay 3.19.0-33-generic #38~14.04.1-Ubuntu SMP Fri Nov 6 18:17:28 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
$ cat /etc/pm/config.d/modules
SUSPEND_MODULES="thunderbolt brcmsmac brcmfmac sbshc sbs"
$ cat /proc/acpi/wakeup
Device  S-state   Status   Sysfs node
PEG0      S3    *disabled  pci:0000:00:01.0
GFX0      S3    *disabled  pci:0000:01:00.0
PEG1      S3    *disabled  pci:0000:00:01.1
PEG2      S3    *disabled  pci:0000:00:01.2
EC        S4    *disabled  platform:PNP0C09:00
GMUX      S3    *disabled  pnp:00:03
HDEF      S3    *disabled  pci:0000:00:1b.0
RP03      S3    *disabled  pci:0000:00:1c.2
ARPT      S4    *enabled   pci:0000:04:00.0
RP04      S3    *disabled  pci:0000:00:1c.3
XHC1      S3    *disabled  pci:0000:00:14.0
ADP1      S4    *disabled  platform:ACPI0003:00
LID0      S4    *enabled   platform:PNP0C0D:00
$ cat /etc/modprobe.d/xhci_hcd.conf
options xhci_hcd quirks=0x80
options xhci_plat_hcd quirks=0x80
$ cat /sys/module/xhci_hcd/parameters/quirks
0
$ cat /proc/cmdline
\vmlinuz-3.19.0-33-generic.efi.signed ro libata.force=noncq modprobe.blacklist=i915 radeon.dpm=1 root=/dev/mapper/vg-root rootflags=subvol=@ cryptopts=target=macbookcrypt,source=/dev/disk/by-uuid/fbb1dc1e-7c49-494f-a940-fdcf39a23d22,lvm=vg resume=/dev/mapper/vg-swap quiet splash  initrd=\initrd.img-3.19.0-33-generic.old-dkms