<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - Rv6xx dpm problems" href="https://bugs.freedesktop.org/show_bug.cgi?id=66963#c175">Comment # 175</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - Rv6xx dpm problems" href="https://bugs.freedesktop.org/show_bug.cgi?id=66963">bug 66963</a> from <a class="email" href="mailto:jsagarribay@gmail.com" title="Jaime Velasco Juan <jsagarribay@gmail.com>"> Jaime Velasco Juan</a> <pre>Created <a href="attachment.cgi?id=91835" name="attach_91835" title="Disable the DMA ring in R6xx">attachment 91835</a> <a href="attachment.cgi?id=91835&action=edit" title="Disable the DMA ring in R6xx">[details]</a> <a href='page.cgi?id=splinter.html&bug=66963&attachment=91835'>[review]</a> Disable the DMA ring in R6xx Hi, I've got an RV620 (HD3450/3470, pci id 1002:95c4). It usually worked with dpm, but hanged on boot maybe 1/10 times. I've been testing the dpm-reorder branch (now drm-next-3.14) and I haven't seen it hang since then. However, with this branch I got the following: [drm:r600_dma_ring_test] *ERROR* radeon: ring 3 test failed (0xCAFEDEAD) and acceleration got disabled. This starts happening with "drm/radeon/pm: move pm handling into the asic specific code". I think the DMA ring is not used by mesa nor xf86-video-ati so I changed the kernel to skip initialisation of the DMA ring and keep acceleration and with that I've had it working every time (can suspend/resume as well). I can't be sure this is the cause as the hangs are random, but the results seem promising so far.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>