AMD R9 M385 is not detected

[Anton Polukhin]

lspci outputs:

antoshkka@antishkka-amd:~$ lspci | grep R9
03:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Bonaire XT [Radeon R9 M280X] (rev ff)

However laptop has AMD R9 M385 and it is correctly displayed as AMD R9 M385 under other operating system.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-video-radeon 1:7.7.0-1
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Sun Sep 11 10:37:24 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Carrizo [1002:9874] (rev c4) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Carrizo [17aa:3807]
InstallationDate: Installed on 2016-09-10 (0 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: LENOVO 80NY
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic.efi.signed root=UUID=d62213ac-da8e-417a-83fb-b8163b78199b ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-ati
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/15/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: CECN43WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Allsparks 5B
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40688 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ideapad Y700-15ACZ
dmi.modalias: dmi:bvnLENOVO:bvrCECN43WW:bd09/15/2015:svnLENOVO:pn80NY:pvrLenovoideapadY700-15ACZ:rvnLENOVO:rnAllsparks5B:rvrSDK0J40688WIN:cvnLENOVO:ct10:cvrLenovoideapadY700-15ACZ:
dmi.product.name: 80NY
dmi.product.version: Lenovo ideapad Y700-15ACZ
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12.2+16.04.20160801.3-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2.3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Sat Sep 10 23:28:47 2016
xserver.configfile: default
xserver.errors: RADEON(G0): [XvMC] Failed to initialize extension.
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.18.3-1ubuntu2.3
xserver.video_driver: amdgpu

[Timo Aaltonen (tjaalton)]

the string is from pci.ids

http://pci-ids.ucw.cz/v2.2/pci.ids

 6646 Bonaire XT [Radeon R9 M280X]

[madbiologist (me-again)]

According to http://developer.amd.com/resources/ati-catalyst-pc-vendor-id-1002-li/ the Radeon R9 M280X and the Radeon R9 M385 share the same device ID (6646), but the Radeon R9 M385 has a revision ID of 80.