| Bug ID | 95015 |
|---|---|
| Summary | [drm:.r600_ring_test [radeon]] *ERROR* radeon: ring 0 test failed (scratch(0x8504)=0xCAFEDEAD) |
| Product | DRI |
| Version | XOrg git |
| Hardware | PowerPC |
| OS | Linux (All) |
| Status | NEW |
| Severity | major |
| Priority | medium |
| Component | DRM/Radeon |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | rsalvaterra@gmail.com |
Created attachment 123045 [details]
dmesg
Full dmesg attached. I have a Power Mac G5 (late 2005, PCIe) with a Radeon HD
6450 (CAICOS, x86 BIOS) installed on the PCIe x16 slot, and I get this error on
boot. I also have a GeForce 6600 (Open Firmware) on a PCIe x8 slot, which works
fine, minus the usual nouveau caveats. I have no idea if this is related at
all, but the x16 slot is directly connected to the U4 northbridge, and is
capable of bypassing the DART IOMMU for 64-bit DMA capable devices (like the
Radeon). The other slots are connected to a PCIe bridge on the HyperTransport
bus, and DMA always goes through the DART. If needed, I can provide ssh access
to the machine.
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