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#1 2014-08-21 16:45:55
- frumble
- Member
- From: Germany
- Registered: 2012-05-20
- Posts: 164
- Website
Radeon driver on HD 7770 only reports 256 MiB RAM [SOLVED]
Hey, just stumbled upon this via the Unigine Heaven/Valley benchmark: It reports my graphics card with only 256 MiB RAM which is wrong (1 GiB model). This command reports the same amount:
$ lspci -v -s $(lspci | grep VGA | cut -d" " -f 1)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X] (prog-if 00 [VGA controller])
Subsystem: PC Partner Limited / Sapphire Technology Device e214
Flags: bus master, fast devsel, latency 0, IRQ 44
Memory at d0000000 (64-bit, prefetchable) [size=256M]
Memory at fe4c0000 (64-bit, non-prefetchable) [size=256K]
I/O ports at 9000 [size=256]
Expansion ROM at fe4a0000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: radeon
libkmod: kmod_config_parse: /etc/modprobe.d/modprobe.conf line 2: ignoring bad line starting with 'options'
Kernel modules: radeonIt's a Sapphire HD 7770 GHz Edition OC with seriously 1 GiB GDDR5 RAM.
Can I do anything about this? I couldn't find a proper xorg.conf parameter. I'm on Linux 3.17 RC1, Mesa 10.2.5 and xorg-server 1.16. Thank you!
Last edited by frumble (2014-08-21 18:11:12)
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#2 2014-08-21 17:44:30
- Gusar
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- Registered: 2009-08-25
- Posts: 3,607
Re: Radeon driver on HD 7770 only reports 256 MiB RAM [SOLVED]
lspci shows the PCI BAR size, not the amount of RAM the card has: http://phoronix.com/forums/showthread.p … #post40510. No idea how Unigine determines the amount of RAM. Can you also check somewhere besides Unigine demos?
Edit: Unigine also says 256MiB on my Haswell machine which has *no* video RAM (there's just the integrated GPU which uses system RAM dynamically), so I wouldn't trust what Unigine says.
Last edited by Gusar (2014-08-21 18:12:04)
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#3 2014-08-21 18:10:31
- frumble
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- From: Germany
- Registered: 2012-05-20
- Posts: 164
- Website
Re: Radeon driver on HD 7770 only reports 256 MiB RAM [SOLVED]
Is this it? "1024M of GTT memory ready"
$ sudo dmesg | grep drm
[ 8.643063] [drm] Initialized drm 1.1.0 20060810
[ 8.670492] [drm] radeon kernel modesetting enabled.
[ 8.670573] fb: switching to radeondrmfb from VESA VGA
[ 8.671081] [drm] initializing kernel modesetting (VERDE 0x1002:0x683D 0x174B:0xE214).
[ 8.671096] [drm] register mmio base: 0xFE4C0000
[ 8.671097] [drm] register mmio size: 262144
[ 8.672042] [drm] Detected VRAM RAM=1024M, BAR=256M
[ 8.672043] [drm] RAM width 128bits DDR
[ 8.672130] [drm] radeon: 1024M of VRAM memory ready
[ 8.672131] [drm] radeon: 1024M of GTT memory ready.
[ 8.672137] [drm] Loading verde Microcode
[ 8.676386] [drm] radeon/VERDE_mc2.bin: 31500 bytes
[ 8.676792] [drm] Internal thermal controller with fan control
[ 8.676863] [drm] probing gen 2 caps for device 1022:9603 = 300d02/0
[ 8.685449] [drm] radeon: dpm initialized
[ 8.688120] [drm] GART: num cpu pages 262144, num gpu pages 262144
[ 8.689486] [drm] probing gen 2 caps for device 1022:9603 = 300d02/0
[ 8.689490] [drm] PCIE gen 2 link speeds already enabled
[ 8.724011] [drm] PCIE GART of 1024M enabled (table at 0x0000000000276000).
[ 8.724648] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 8.724648] [drm] Driver supports precise vblank timestamp query.
[ 8.724701] [drm] radeon: irq initialized.
[ 9.244109] [drm] ring test on 0 succeeded in 1 usecs
[ 9.244117] [drm] ring test on 1 succeeded in 1 usecs
[ 9.244122] [drm] ring test on 2 succeeded in 1 usecs
[ 9.244188] [drm] ring test on 3 succeeded in 4 usecs
[ 9.244196] [drm] ring test on 4 succeeded in 2 usecs
[ 9.431029] [drm] ring test on 5 succeeded in 2 usecs
[ 9.431035] [drm] UVD initialized successfully.
[ 9.431165] [drm] ib test on ring 0 succeeded in 0 usecs
[ 9.431208] [drm] ib test on ring 1 succeeded in 0 usecs
[ 9.431249] [drm] ib test on ring 2 succeeded in 0 usecs
[ 9.431293] [drm] ib test on ring 3 succeeded in 0 usecs
[ 9.431337] [drm] ib test on ring 4 succeeded in 0 usecs
[ 9.582906] [drm] ib test on ring 5 succeeded
[ 9.583985] [drm] Radeon Display Connectors
[ 9.583992] [drm] Connector 0:
[ 9.583996] [drm] DP-1
[ 9.583999] [drm] HPD2
[ 9.584004] [drm] DDC: 0x6540 0x6540 0x6544 0x6544 0x6548 0x6548 0x654c 0x654c
[ 9.584007] [drm] Encoders:
[ 9.584010] [drm] DFP1: INTERNAL_UNIPHY2
[ 9.584013] [drm] Connector 1:
[ 9.584015] [drm] DP-2
[ 9.584017] [drm] HPD3
[ 9.584022] [drm] DDC: 0x6570 0x6570 0x6574 0x6574 0x6578 0x6578 0x657c 0x657c
[ 9.584024] [drm] Encoders:
[ 9.584027] [drm] DFP2: INTERNAL_UNIPHY2
[ 9.584029] [drm] Connector 2:
[ 9.584032] [drm] HDMI-A-1
[ 9.584034] [drm] HPD1
[ 9.584038] [drm] DDC: 0x6530 0x6530 0x6534 0x6534 0x6538 0x6538 0x653c 0x653c
[ 9.584040] [drm] Encoders:
[ 9.584043] [drm] DFP3: INTERNAL_UNIPHY1
[ 9.584046] [drm] Connector 3:
[ 9.584048] [drm] DVI-I-1
[ 9.584050] [drm] HPD4
[ 9.584054] [drm] DDC: 0x6560 0x6560 0x6564 0x6564 0x6568 0x6568 0x656c 0x656c
[ 9.584057] [drm] Encoders:
[ 9.584060] [drm] DFP4: INTERNAL_UNIPHY
[ 9.584062] [drm] CRT1: INTERNAL_KLDSCP_DAC1
[ 9.659373] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128
[ 9.688444] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128
[ 9.717514] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128
[ 9.746572] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128
[ 9.749716] [drm] fb mappable at 0xD0479000
[ 9.749717] [drm] vram apper at 0xD0000000
[ 9.749718] [drm] size 14745600
[ 9.749718] [drm] fb depth is 24
[ 9.749719] [drm] pitch is 10240
[ 9.749816] fbcon: radeondrmfb (fb0) is primary device
[ 9.789773] radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
[ 9.816129] [drm] Initialized radeon 2.40.0 20080528 for 0000:01:00.0 on minor 0Thank you for your link! Then the 256 MiB are not all my system sees. 
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#4 2014-08-21 18:13:54
- Gusar
- Member
- Registered: 2009-08-25
- Posts: 3,607
Re: Radeon driver on HD 7770 only reports 256 MiB RAM [SOLVED]
Yeah, those numbers look much better, this line couldn't be any clearer:
[ 8.672042] [drm] Detected VRAM RAM=1024M, BAR=256MOffline