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I made a fresh install of F15 on my desktop. I can get to the graphical login screen, but if I login with my user account, the system locks up. (Mouse doesn't move, Caps Lock light doesn't toggle, etc.) If I turn off gnome-shell, I can login successfully, so I believe this is due to the 3D driver causing problems. I have an RV635 card, specifically an ATI Radeon HD 3650 AGP. The system worked out-of-the-box with Fedora 13. Apologies if I haven't filed this with the right component. Version-Release number of selected component (if applicable): System info reports driver as "Gallium 0.4 on AMD RV635". xorg-x11-drv-ati-6.14.1-1.20110504gita6d2dba6.fc15.i686 kernel-PAE-2.6.38.6-27.fc15.i686 mesa-dri-drivers-7.11-0.9.20110509.0.fc15.i686 Additional info: I have a 30" LCD panel operating at 2560x1600 resolution, which has traditionally exposed some weird bugs in the Radeon drivers. But as I mentioned, my setup worked out-of-the-box on Fedora 13.
does booting with radeon.agpmode=-1 help?
Yes. I can log in successfully with GNOME Shell. If the best route is for me to manually tweak my GRUB configuration so that I can at least use the system, that's fine, but if there's something I can do to help with getting it so that the system works out-of-the-box, I'd like to do that.
can you attach a full dmesg? also try radeon.agpmode=1,2,4,8 the option it takes depends on the AGP bridge.
Created attachment 501641 [details] dmesg from radeon.agpmode=-1 boot Here is the dmesg from booting with radeon.agpmode=-1. Below are the results from booting with other agpmode values. My motherboard should support 8x AGP. 8 - lockup on login as reported 4, 1 - boots OK; some weird whole-screen artifacts on login; desktop background appears, but unable to do anything (mouse moves, though); lockup on attempt to switch to text console 2 - screen artifacts on boot; I think it locked up before I even got to try to login in; I can test again if this is actually relevant. By "screen artifacts", I mean that the display looked like what you'd want, except phased wrong on the screen. What should have been the top-left pixel was somewhere toward the bottom right of the screen, and what should have been the bottom-right pixel was one pixel above and to the left of that.
Fixed with latest batch of Fedora updates. Maybe the kernel update.