It seems like every time I boot I see something different. Here is a summary for plymouth without KMS:
What always happens with radeon.modeset=0:
1. text mode is not changed (big fonts)
2. blue progress bars displayed at bottom
What has sometimes happened with radeon.modeset=0:
1. text outside of blue progress bar
2. gdm comes up ok
3. get the half and half gdm screen. Alt+SysRq+K fixes it
4. get the half and half gdm screen, changing to tty1 and back fixes it
5. gdm comes up ok, going to a tty that gdm is not running on shows the half and half screen (weird!) but going back to gdm seems ok. Alt+SysRq+K does not fix the tty
6. gdm comes up ok, going to a tty that gdm is not running on shows the half and half screen (weird!) but going back to gdm shows all kinds of 'twinkling artifacts' along the upper half inch of the screen, but gdm otherwise looks ok.
It seems like every time I boot I see something different. Here is a summary for plymouth without KMS:
What always happens with radeon.modeset=0:
1. text mode is not changed (big fonts)
2. blue progress bars displayed at bottom
What has sometimes happened with radeon.modeset=0:
1. text outside of blue progress bar
2. gdm comes up ok
3. get the half and half gdm screen. Alt+SysRq+K fixes it
4. get the half and half gdm screen, changing to tty1 and back fixes it
5. gdm comes up ok, going to a tty that gdm is not running on shows the half and half screen (weird!) but going back to gdm seems ok. Alt+SysRq+K does not fix the tty
6. gdm comes up ok, going to a tty that gdm is not running on shows the half and half screen (weird!) but going back to gdm shows all kinds of 'twinkling artifacts' along the upper half inch of the screen, but gdm otherwise looks ok.