Unsupported or incorrect installed GPU driver detected! [ATI HD 7870]

[mondee]

Okay!

I have installed the "amd-driver-installer-14.20-x86.x86_64.run" file and got this error:

Device #1: Kernel ./kernels/4098/m0400.Pitcairn_1526.3_1526.3 (VM).kernel not found in cache! Building may take a while...

ERROR: ./kernels/4098/m0400.VLIW1.llvmir: No such file or directory

Why? What can I do ?