Linux: can't downgrade ATI graphic driver
- by java.is.for.desktop
I had the old 10.9 driver of ATI, it worked fine.
Sadly, I decided to upgrade it to the new 10.12. After that, HDMI stopped working. So, I want to downgrade back to 10.9. I did everything by the book. But it fails:
As root, I do:
cd /usr/share/ati
sh ./fglrx-uninstall.sh
Yes, the uninstall process tells me that everything is fine uninstalled.
And after doing reboot, I have the default opensource ATI driver which comes with X11 (or the kernel?). The ATI control panel shortcut points to nowhere. So, the driver seems uninstalled.
Now I install the older (10.9) proprietary ATI driver. It also finishes successfully. But after reboot, the ATI control panel tells me that I still have 10.12. And it seems to be true, because HDMI doesn't work.
So, how can I completely purge the new non-working driver and downgrade to the old one?