On Fri, 2012-09-28 at 19:46 +0100, lejeczek wrote: > thanks Alex for your patience, appreciate it I do > > what would be the droids I need? > I'm experiencing guests' "puzzling" behavior and was > suggested that command line arguments were wrong/incomplete. > > same box/hardware and radeon 5450 and ... > - winXP-32bit -> OK - I assumed getting the guest on a > external computer monitor was an ultimate test > - win7-64bit -> OS reports device as disabled cause the > device reported an error
I've had this same card working with both of these guests. I believe one trick on win7 was to use -cpu host. Also, don't try to disable the emulated vga device, just set it up like a dual-head system. Once you load the catalyst driver windows will switch to use the assigned device exclusively. I was using the new vfio assignment driver, but someone else recently report it working with the existing driver as well. The 5450 should be a secondary graphics card on the host system, trying to assign the primary graphics is going to cause more problems. Also blacklist the radeon driver on the host, we don't need any leftover state from the Linux driver causing problems since most of these graphics cards don't support a reset mechanism. > same box as above and geforce gt640 and .. > for both XP and 7 report device with exclamation marks (thus > did not even bother to connect any screens like in working > case with XP & radeon) I don't think we've seen any reports yet of Nvidia cards working, there's another thread on the kvm list speculating at some of the problems. > I'll try to get hold of ROMs of the cards, meanwhile, how > can I troubleshoot it? how to get more verbose feedback and > what to specifically look for? ROMs are only going to help if you're getting errors trying to read the ROM. Nvidia seems to have this problem, but I don't think radeons typical do. There's a #define in the code that can be enabled to get more logging, but it's not terribly useful unless you know what you're looking at. VGA has plenty of issues with legacy PC address ranges that are known problems, but there are also plenty of unknown problems that make it a pretty difficult black box debugging project. Thanks, Alex
