fglrx DRI initialization fails on Radeon HD 7660G (Trinity)

[S. Christian Collins]

After upgrading from Precise to Trusty, I can no longer activate OpenGL desktop effects in KDE. Upon investigating, I find the following in the Xorg.log file:

[ 30.414] (EE) fglrx(0): atiddxDriScreenInit failed. Probably kernel module missing or incompatible.
[ 30.414] (WW) fglrx(0): ***********************************************************
[ 30.414] (WW) fglrx(0): * DRI initialization failed *
[ 30.414] (WW) fglrx(0): * kernel module (fglrx.ko) may be missing or incompatible *
[ 30.414] (WW) fglrx(0): * 2D and 3D acceleration disabled *
[ 30.414] (WW) fglrx(0): ***********************************************************

glxinfo returns:
name of display: :0
X Error of failed request: BadRequest (invalid request code or no such operation)
  Major opcode of failed request: 157 (ATIFGLEXTENSION)
  Minor opcode of failed request: 66 ()
  Serial number of failed request: 13
  Current serial number in output stream: 13

and fglrxinfo returns:
X Error of failed request: BadRequest (invalid request code or no such operation)
  Major opcode of failed request: 157 (ATIFGLEXTENSION)
  Minor opcode of failed request: 66 ()
  Serial number of failed request: 13
  Current serial number in output stream: 13

Purging fglrx and fglrx-amdcccle and reinstalling the driver doesn't fix anything. The previous driver on Ubuntu Precise worked fine (fglrx 12.104, if I recall).

** My System **
OS: Kubuntu 14.04 amd64 w/ KDE SC 4.13.0
PC: HP Pavilion m6-1035dx
CPU/GPU: AMD A10-4600M APU with Radeon HD 7660G Graphics
RAM: 6GB DDR3 800 MHz
Linux Kernel: 3.13.0-24-generic
Screen Resolution: 1366 x 768
AMD Catalyst (fglrx) driver version: 2:13.350.1-0ubuntu2
Xserver: 2:1.15.1-0ubuntu2

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: fglrx 2:13.350.1-0ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CurrentDesktop: KDE
Date: Sat Apr 19 23:33:41 2014
InstallationDate: Installed on 2012-08-22 (605 days ago)
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120423)
SourcePackage: fglrx-installer
UpgradeStatus: Upgraded to trusty on 2014-04-18 (1 days ago)

[S. Christian Collins (s-chriscollins)]

Turns out fglrx was in /etc/modprobe.d/blacklist-local.conf for some reason. After removing it, the Catalyst driver works fine. Marking the bug as invalid.

[pintubigfoot (pintubigfoot)]

Thanks for the finding. Indeed mine was also found fglrx in /etc/modprobe.d/blacklist-local.conf. Not sure how it happened, cos I was upgrading from 11.04 > 11.10 > 12.04 > 14.04. Spent so much time to figure out this problem! :)