Ubuntu is recognizing the incorrect GPU and using the wrong driver. I have Radeon HD 6400M but it thinks its a Mesa DRI Intel(R) Sandybridge Mobile.
How can I fix this?
Output from lscpi:
lspci -nn | grep -E 'VGA|Display'
00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09)
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] [1002:6760] (rev ff)
Checking glxinfo:
$ glxinfo | grep evice
Device: Mesa DRI Intel(R) Sandybridge Mobile (0x126)
When running dmesg | egrep 'drm|radeon', I get:
[ 1.155405] [drm] radeon kernel modesetting enabled.
[ 1.161036] radeon 0000:01:00.0: enabling device (0006 -> 0007)
[ 1.161204] [drm] initializing kernel modesetting (CAICOS 0x1002:0x6760 0x17AA:0x3976 0x00).
[ 1.201196] [drm] GPU not posted. posting now...
[ 1.204486] radeon 0000:01:00.0: VRAM: 1024M 0x0000000000000000 - 0x000000003FFFFFFF (1024M used)
[ 1.204487] radeon 0000:01:00.0: GTT: 1024M 0x0000000040000000 - 0x000000007FFFFFFF
[ 1.204490] [drm] Detected VRAM RAM=1024M, BAR=256M
[ 1.204490] [drm] RAM width 64bits DDR
[ 1.204576] [drm] radeon: 1024M of VRAM memory ready
[ 1.204577] [drm] radeon: 1024M of GTT memory ready.
[ 1.204582] [drm] Loading CAICOS Microcode
[ 1.204646] [drm] Internal thermal controller without fan control
[ 1.208987] [drm] radeon: dpm initialized
[ 1.209049] [drm] GART: num cpu pages 262144, num gpu pages 262144
[ 1.209596] [drm] PCIE gen 2 link speeds already enabled
[ 1.212234] [drm] PCIE GART of 1024M enabled (table at 0x0000000000162000).
[ 1.212340] radeon 0000:01:00.0: WB enabled
[ 1.212342] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff9a125c801c00
[ 1.212343] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff9a125c801c0c
[ 1.213095] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x0000000000072118 and cpu addr 0xffffbfe701632118
[ 1.213160] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 1.213161] [drm] Driver supports precise vblank timestamp query.
[ 1.213162] radeon 0000:01:00.0: radeon: MSI limited to 32-bit
[ 1.213202] radeon 0000:01:00.0: radeon: using MSI.
[ 1.213243] [drm] radeon: irq initialized.
[ 1.304171] [drm] Memory usable by graphics device = 2048M
[ 1.304172] [drm] Replacing VGA console driver
[ 1.310040] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 1.310041] [drm] Driver supports precise vblank timestamp query.
[ 1.312843] radeon 0000:01:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=none
[ 1.444517] [drm:r600_ring_test [radeon]] *ERROR* radeon: ring 0 test failed (scratch(0x8504)=0xCAFEDEAD)
[ 1.444523] radeon 0000:01:00.0: disabling GPU acceleration
[ 1.446806] [drm] Radeon Display Connectors
[ 1.457791] [drm] Initialized radeon 2.50.0 20080528 for 0000:01:00.0 on minor 0
[ 1.458122] [drm] Initialized i915 1.6.0 20170619 for 0000:00:02.0 on minor 1
[ 1.628841] fbcon: inteldrmfb (fb0) is primary device
[ 1.628906] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 19.627456] [drm] PCIE gen 2 link speeds already enabled
[ 19.628643] radeon 0000:01:00.0: No VRAM object for PCIE GART.
[ 19.628668] [drm:evergreen_resume [radeon]] *ERROR* evergreen startup failed on resume
[ 25.487343] [drm] PCIE gen 2 link speeds already enabled
[ 25.488530] radeon 0000:01:00.0: No VRAM object for PCIE GART.
[ 25.488557] [drm:evergreen_resume [radeon]] *ERROR* evergreen startup failed on resume
[ 34.542929] [drm] PCIE gen 2 link speeds already enabled
[ 34.544161] radeon 0000:01:00.0: No VRAM object for PCIE GART.
[ 34.544387] [drm:evergreen_resume [radeon]] *ERROR* evergreen startup failed on resume
[ 63.724953] [drm] PCIE gen 2 link speeds already enabled
[ 63.726152] radeon 0000:01:00.0: No VRAM object for PCIE GART.
[ 63.726211] [drm:evergreen_resume [radeon]] *ERROR* evergreen startup failed on resume
