After renaming atiapfuser.blb to something else (atiapfuser.blb.bak), I rebooted, and these entries stopped piling up. It's been a few days since I did this, and I haven't seen them at all, and I don't get any more errors about maximum number of clients reached.
I'm running an AMD Radeon HD 6450 with the driver downloaded and installed from the AMD website (http:// support. amd.com/ en-us/download/ desktop? os=Linux% 20x86)
When running "sudo lsof -P `pidof X`" I would also see a lot of entries like another user mentioned above:
Xorg 21747 root 103r REG 8,4 0 16387220 /etc/ati/ atiapfuser. blb
After renaming atiapfuser.blb to something else (atiapfuser. blb.bak) , I rebooted, and these entries stopped piling up. It's been a few days since I did this, and I haven't seen them at all, and I don't get any more errors about maximum number of clients reached.