Created attachment 522040 [details]
Description of problem:
I get Gnome 3 fallback mode on Radeon 2100 in dualhead configuration (2 monitors).
Version-Release number of selected component (if applicable):
#rpm -q xorg-x11-drv-ati
Always on Radeon 2100
Steps to Reproduce:
1. Plug second monitor and reboot
2. login in gnome3
I get Gnome 3 fallback mode
Gnome Shell mast work on this hardware.
Thanks for the bug report. We have reviewed the information you have provided above, and there is some additional information we require that will be helpful in our diagnosis of this issue.
Please add drm.debug=0x04 to the kernel command line, restart computer, and attach
* your X server config file (/etc/X11/xorg.conf, if available),
* X server log file (/var/log/Xorg.*.log*; check with grep Backtrace /var/log/Xorg* which logs might be the most interesting ones, if you none log matches, attachment in the comment 0 is enough),
* output of the dmesg command, and
* system log (/var/log/messages)
to the bug report as individual uncompressed file attachments using the bugzilla file attachment link above.
We will review this issue again once you've had a chance to attach this information.
Thanks in advance.
Created attachment 522892 [details]
Created attachment 522893 [details]
Created attachment 522894 [details]
Created attachment 522895 [details]
(In reply to comment #1)
> Thanks for the bug report. We have reviewed the information you have provided
> above, and there is some additional information we require that will be helpful
> in our diagnosis of this issue.
> Please add drm.debug=0x04 to the kernel command line, restart computer, and
thanks for the answer.
I attached the required files.
# cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-3.1.0-0.rc4.git0.0.fc16.x86_64 root=/dev/mapper/VolGroup-lv_root ro rd.md=0 rd.dm=0 rd.lvm.lv=VolGroup/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=VolGroup/lv_root rd.luks=0 LANG=en_US.UTF-8 drm.debug=0x04
You are just hiting hw limitation r3xx 3D block can't render to surface bigger that 2048 (don't remember the exact size). Your 2 monitor size by side just exceed this limit.