[Bugme-janitors] [Bug 14596] New: radeon DRI driver produces garbled console with KMS enabled on Thinkpad T42

[bugzilla-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=14596

           Summary: radeon DRI driver produces garbled console with KMS
                    enabled on Thinkpad T42
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.3x
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri at kernel-bugs.osdl.org
        ReportedBy: pm at debian.org
        Regression: Yes


I'm currently on 2.6.32-rc7-00052-g0a24168, but this has happened since KMS was
introduced. Booting with radeon.modeset=0 works around the problem.

The display is OK, except that the console font is garbled horizontally, as if
the pixels for each character are slightly permuted or interleaved.

 [drm] Initialized drm 1.1.0 20060810
 [drm] Initialized radeon 1.31.0 20080528 for 0000:01:00.0 on minor 0
 agpgart-intel 0000:00:00.0: AGP 2.0 bridge
 agpgart-intel 0000:00:00.0: putting AGP V2 device into 4x mode
 pci 0000:01:00.0: putting AGP V2 device into 4x mode
 [drm] Setting GART location based on new memory map
 [drm] Loading R100 Microcode
 platform radeon_cp.0: firmware: requesting radeon/R100_cp.bin
 [drm] writeback test succeeded in 1 usecs
 mtrr: no MTRR for e0000000,2000000 found
 [drm] Module unloaded
 [drm] Initialized drm 1.1.0 20060810
 [drm] radeon defaulting to kernel modesetting.
 [drm] radeon kernel modesetting enabled.
 [drm] radeon: Initializing kernel modesetting.
 [drm] register mmio base: 0xC0100000
 [drm] register mmio size: 65536
 [drm] GPU reset succeed (RBBM_STATUS=0x00000140)
 agpgart-intel 0000:00:00.0: AGP 2.0 bridge
 agpgart-intel 0000:00:00.0: putting AGP V2 device into 1x mode
 radeon 0000:01:00.0: putting AGP V2 device into 1x mode
 [drm] radeon: VRAM 64M
 [drm] radeon: VRAM from 0x00000000 to 0x03FFFFFF
 [drm] radeon: GTT 256M
 [drm] radeon: GTT from 0xD0000000 to 0xDFFFFFFF
 [drm] radeon: irq initialized.
 [drm] Detected VRAM RAM=64M, BAR=128M
 [drm] RAM width 64bits DDR
 [TTM] Zone  kernel: Available graphics memory: 443890 kiB.
 [TTM] Zone highmem: Available graphics memory: 1037494 kiB.
 [drm] radeon: 32M of VRAM memory ready
 [drm] radeon: 256M of GTT memory ready.
 [drm] radeon: cp idle (0x00008080)
 [drm] Loading R100 Microcode
 platform radeon_cp.0: firmware: requesting radeon/R100_cp.bin
 [drm] radeon: ring at 0x00000000D0000000
 [drm] ring test succeeded in 1 usecs
 [drm] radeon: ib pool ready.
 [drm] ib test succeeded in 0 usecs
 [drm] DFP table revision: 2
 [drm] Panel ID String: 1024x768
 [drm] Panel Size 1024x768
 [drm] Default TV standard: NTSC
 [drm] 27.000000000 MHz TV ref clk
 [drm] Radeon Display Connectors
 [drm] Connector 0:
 [drm]   VGA
 [drm]   DDC: 0x60 0x60 0x60 0x60 0x60 0x60 0x60 0x60
 [drm]   Encoders:
 [drm]     CRT1: INTERNAL_DAC1
 [drm] Connector 1:
 [drm]   DVI-D
 [drm]   DDC: 0x64 0x64 0x64 0x64 0x64 0x64 0x64 0x64
 [drm]   Encoders:
 [drm]     DFP1: INTERNAL_TMDS1
 [drm] Connector 2:
 [drm]   LVDS
 [drm]   Encoders:
 [drm]     LCD1: INTERNAL_LVDS
 [drm] Connector 3:
 [drm]   S-video
 [drm]   Encoders:
 [drm]     TV1: INTERNAL_DAC2
 [drm] fb mappable at 0xE0040000
 [drm] vram apper at 0xE0000000
 [drm] size 3145728
 [drm] fb depth is 24
 [drm]    pitch is 4096
 [drm] LVDS-13: set mode 1024x768 17
 Console: switching to colour frame buffer device 128x48
 fb0: radeondrmfb frame buffer device
 registered panic notifier
 [drm] Initialized radeon 2.0.0 20080528 for 0000:01:00.0 on minor 0

Xorg identifies the card as:
(--) RADEON(0): Chipset: "ATI Radeon Mobility M7 LW (AGP)" (ChipID = 0x4c57)
(II) RADEON(0): Detected total video RAM=32768K, accessible=65536K (PCI
BAR=131072K)
(--) RADEON(0): Mapped VideoRAM: 32768 kByte (64 bit DDR SDRAM)

lspci says:
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M7 LW
[Radeon Mobility 7500]

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