[Bug 42920] Radeon with KMS and UMA works only up to 128MB

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https://bugzilla.kernel.org/show_bug.cgi?id=42920





--- Comment #8 from j.fikar@xxxxxxxxx  2012-04-02 13:58:16 ---
The problem is solved! I forgot I have a custom dsdt.hex, created with small
amount of UMA memory. Removing the custom dsdt.hex solves the problem:

[    6.976583] [drm] Initialized drm 1.1.0 20060810
[    7.127923] [drm] radeon defaulting to kernel modesetting.
[    7.127925] [drm] radeon kernel modesetting enabled.
[    7.127974] radeon 0000:01:05.0: setting latency timer to 64
[    7.128093] [drm] initializing kernel modesetting (RS880 0x1002:0x9715
0x1043:0x843E).
[    7.128108] [drm] register mmio base: 0xFEBE0000
[    7.128109] [drm] register mmio size: 65536
[    7.128705] [drm] CONFIG_MEMSIZE: 0x40000000
[    7.128708] radeon 0000:01:05.0: VRAM: 1024M 0x00000000C0000000 -
0x00000000FFFFFFFF (1024M used)
[    7.128710] radeon 0000:01:05.0: GTT: 512M 0x00000000A0000000 -
0x00000000BFFFFFFF
[    7.132802] [drm] Detected VRAM RAM=1024M, BAR=256M
[    7.132805] [drm] RAM width 32bits DDR
[    7.132896] [drm] radeon: 1024M of VRAM memory ready
[    7.132897] [drm] radeon: 512M of GTT memory ready.
[    7.132910] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[    7.132911] [drm] Driver supports precise vblank timestamp query.
[    7.132932] [drm] radeon: irq initialized.
[    7.132935] [drm] GART: num cpu pages 131072, num gpu pages 131072
[    7.133487] [drm] radeon: ib pool ready.
[    7.133551] [drm] Loading RS780 Microcode
[    7.245054] [drm] PCIE GART of 512M enabled (table at 0x00000000C0040000).
[    7.245117] radeon 0000:01:05.0: WB enabled
[    7.245119] [drm] fence driver on ring 0 use gpu addr 0xa0000c00 and cpu
addr 0xffff8804156aec00
[    7.277226] [drm] ring test on 0 succeeded in 1 usecs
[    7.277296] [drm] ib test on ring 0 succeeded in 0 usecs
[    7.582928] [drm] radeon: blit 1024 bo moves of 1024 kB from 2 to 4 in 305
ms, throughput: 27496 Mb/s or 3437 MB/s
[    7.888011] [drm] radeon: blit 1024 bo moves of 1024 kB from 4 to 2 in 305
ms, throughput: 27496 Mb/s or 3437 MB/s
[    7.888368] [drm] Radeon Display Connectors
[    7.888370] [drm] Connector 0:
[    7.888371] [drm]   VGA
[    7.888372] [drm]   DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c
0x7e4c
[    7.888373] [drm]   Encoders:
[    7.888374] [drm]     CRT1: INTERNAL_KLDSCP_DAC1
[    7.888375] [drm] Connector 1:
[    7.888376] [drm]   HDMI-A
[    7.888377] [drm]   HPD3
[    7.888378] [drm]   DDC: 0x7e50 0x7e50 0x7e54 0x7e54 0x7e58 0x7e58 0x7e5c
0x7e5c
[    7.888380] [drm]   Encoders:
[    7.888381] [drm]     DFP3: INTERNAL_KLDSCP_LVTMA
[    7.888404] [drm] radeon: power management initialized
[    7.961690] [drm] fb mappable at 0xD0142000
[    7.961692] [drm] vram apper at 0xD0000000
[    7.961693] [drm] size 3932160
[    7.961694] [drm] fb depth is 24
[    7.961695] [drm]    pitch is 5120
[    7.961753] fbcon: radeondrmfb (fb0) is primary device
[    7.984815] fb0: radeondrmfb frame buffer device
[    7.984816] drm: registered panic notifier
[    7.984820] [drm] Initialized radeon 2.13.0 20080528 for 0000:01:05.0 on
minor 0

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