I have the same problem with HD6630. In Xorg.log I see segmentation fault error.
[ 44.537] (EE) [ 44.537] (EE) Backtrace: [ 44.591] (EE) 0: /usr/bin/X (xorg_backtrace+0x36) [0x7f756ee10bd6] [ 44.591] (EE) 1: /usr/bin/X (0x7f756ec68000+0x1aca09) [0x7f756ee14a09] [ 44.591] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f756df8e000+0xfcb0) [0x7f756df9dcb0] [ 44.591] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f756aaee000+0x6d163) [0x7f756ab5b163] [ 44.591] (EE) 4: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (xdl_xs113_atiddxPxPreInit+0x125) [0x7f756b3ea9e5] [ 44.591] (EE) 5: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (xdl_xs113_atiddxPreInit+0x1f59) [0x7f756b3c75e9] [ 44.591] (EE) 6: /usr/bin/X (InitOutput+0xb02) [0x7f756ecffb72] [ 44.591] (EE) 7: /usr/bin/X (0x7f756ec68000+0x44386) [0x7f756ecac386] [ 44.591] (EE) 8: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7f756cc1376d] [ 44.591] (EE) 9: /usr/bin/X (0x7f756ec68000+0x448ad) [0x7f756ecac8ad] [ 44.591] (EE) [ 44.591] (EE) Segmentation fault at address 0xc0 [ 44.591]
I have the same problem with HD6630. In Xorg.log I see segmentation fault error.
[ 44.537] (EE) +0x36) [0x7f756ee10bd6] +0x1aca09) [0x7f756ee14a09] 64-linux- gnu/libpthread. so.0 (0x7f756df8e000 +0xfcb0) [0x7f756df9dcb0] xorg/modules/ drivers/ intel_drv. so (0x7f756aaee000 +0x6d163) [0x7f756ab5b163] x86_64- linux-gnu/ xorg/extra- modules/ extra-modules. dpkg-tmp/ modules/ drivers/ fglrx_drv. so (xdl_xs113_ atiddxPxPreInit +0x125) [0x7f756b3ea9e5] x86_64- linux-gnu/ xorg/extra- modules/ extra-modules. dpkg-tmp/ modules/ drivers/ fglrx_drv. so (xdl_xs113_ atiddxPreInit+ 0x1f59) [0x7f756b3c75e9] +0x44386) [0x7f756ecac386] 64-linux- gnu/libc. so.6 (__libc_ start_main+ 0xed) [0x7f756cc1376d] +0x448ad) [0x7f756ecac8ad]
[ 44.537] (EE) Backtrace:
[ 44.591] (EE) 0: /usr/bin/X (xorg_backtrace
[ 44.591] (EE) 1: /usr/bin/X (0x7f756ec68000
[ 44.591] (EE) 2: /lib/x86_
[ 44.591] (EE) 3: /usr/lib/
[ 44.591] (EE) 4: /usr/lib/
[ 44.591] (EE) 5: /usr/lib/
[ 44.591] (EE) 6: /usr/bin/X (InitOutput+0xb02) [0x7f756ecffb72]
[ 44.591] (EE) 7: /usr/bin/X (0x7f756ec68000
[ 44.591] (EE) 8: /lib/x86_
[ 44.591] (EE) 9: /usr/bin/X (0x7f756ec68000
[ 44.591] (EE)
[ 44.591] (EE) Segmentation fault at address 0xc0
[ 44.591]