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• Attach radeon driver to specific PCI devices?

  - by genpfault

  I have two Radeon cards in this machine, a 6570 and a 6950: lspci | grep VGA: 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Turks [Radeon HD 6570] 02:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Cayman PRO [Radeon HD 6950] I'm trying to get VGA passthrough to work with KVM on Debian Wheezy, passing through the 6950 as a secondary video card to a Windows 7 guest. This works fine if I blacklist the radeon kernel module via /etc/modprobe.d/. If I remove the blacklist to run X11 (or even just a KMS console) on the 6570 the radeon module seems to attach to both cards: dmesg | egrep "01:00.0|02:00.0|radeon": pci 0000:01:00.0: [1002:6759] type 0 class 0x000300 pci 0000:01:00.0: reg 10: [mem 0xe0000000-0xefffffff 64bit pref] pci 0000:01:00.0: reg 18: [mem 0xf7e20000-0xf7e3ffff 64bit] pci 0000:01:00.0: reg 20: [io 0xe000-0xe0ff] pci 0000:01:00.0: reg 30: [mem 0xf7e00000-0xf7e1ffff pref] pci 0000:01:00.0: supports D1 D2 pci 0000:02:00.0: [1002:6719] type 0 class 0x000300 pci 0000:02:00.0: reg 10: [mem 0xd0000000-0xdfffffff 64bit pref] pci 0000:02:00.0: reg 18: [mem 0xf7d20000-0xf7d3ffff 64bit] pci 0000:02:00.0: reg 20: [io 0xd000-0xd0ff] pci 0000:02:00.0: reg 30: [mem 0xf7d00000-0xf7d1ffff pref] pci 0000:02:00.0: supports D1 D2 vgaarb: device added: PCI:0000:01:00.0,decodes=io+mem,owns=io+mem,locks=none vgaarb: device added: PCI:0000:02:00.0,decodes=io+mem,owns=none,locks=none vgaarb: bridge control possible 0000:02:00.0 vgaarb: bridge control possible 0000:01:00.0 pci 0000:01:00.0: Boot video device [drm] radeon kernel modesetting enabled. radeon 0000:01:00.0: setting latency timer to 64 radeon 0000:01:00.0: VRAM: 1024M 0x0000000000000000 - 0x000000003FFFFFFF (1024M used) radeon 0000:01:00.0: GTT: 512M 0x0000000040000000 - 0x000000005FFFFFFF [drm] radeon: 1024M of VRAM memory ready [drm] radeon: 512M of GTT memory ready. radeon 0000:01:00.0: irq 46 for MSI/MSI-X radeon 0000:01:00.0: radeon: using MSI. [drm] radeon: irq initialized. radeon 0000:01:00.0: WB enabled [drm] radeon: ib pool ready. [drm] radeon: power management initialized fbcon: radeondrmfb (fb0) is primary device fb0: radeondrmfb frame buffer device [drm] Initialized radeon 2.12.0 20080528 for 0000:01:00.0 on minor 0 radeon 0000:02:00.0: enabling device (0000 -> 0003) radeon 0000:02:00.0: setting latency timer to 64 radeon 0000:02:00.0: VRAM: 2048M 0x0000000000000000 - 0x000000007FFFFFFF (2048M used) radeon 0000:02:00.0: GTT: 512M 0x0000000080000000 - 0x000000009FFFFFFF [drm] radeon: 2048M of VRAM memory ready [drm] radeon: 512M of GTT memory ready. radeon 0000:02:00.0: irq 49 for MSI/MSI-X radeon 0000:02:00.0: radeon: using MSI. [drm] radeon: irq initialized. radeon 0000:02:00.0: WB enabled [drm] radeon: ib pool ready. [drm] radeon: power management initialized fb1: radeondrmfb frame buffer device [drm] Initialized radeon 2.12.0 20080528 for 0000:02:00.0 on minor 1 [drm] radeon: finishing device. radeon 0000:02:00.0: ffff88041a941800 unpin not necessary [drm] radeon: ttm finalized pci-stub 0000:02:00.0: claimed by stub pci-stub 0000:02:00.0: irq 49 for MSI/MSI-X This causes the Win7 VM to bluescreen on boot. How can I configure things so that the radeon module only attaches to the 6570 and not the 6950?

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• OpenGL Motion blur with the accumulation buffer in WxWidgets

  - by Klaus

  Hello, I'm trying to achieve a motion blur effect in my OpenGL application. I read somewhere this solution, using the accumulation buffer: glAccum(GL_MULT, 0.90); glAccum(GL_ACCUM, 0.10); glAccum(GL_RETURN, 1.0); glFlush(); at the end of the render loop. But nothing happens... What am I missing ? Additions after genpfault answer: Indeed I did not asked for an accumulation buffer when I initialized my context. So I tried to pass an array of attributes to the constructor of my wxGLCanvas, as described here: http://docs.wxwidgets.org/2.6/wx_wxglcanvas.html : int attribList[]={ WX_GL_RGBA , WX_GL_DOUBLEBUFFER , WX_GL_MIN_ACCUM_RED, WX_GL_MIN_ACCUM_GREEN, WX_GL_MIN_ACCUM_BLUE, 0} But all I get is a friendly Seg fault. Does someone understand how to use this ? (no problems with int attribList[]={ WX_GL_RGBA , WX_GL_DOUBLEBUFFER , 0})

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