Comment 6 for bug 1418822

Despite there is no EE message in Xorg.0.log, possible error message could be found in dmesg output after resumed from S3 for a while:
[ 355.356338] <6>[fglrx] ASIC hang happened
[ 355.356342] CPU: 2 PID: 1149 Comm: Xorg Tainted: P OX 3.13.0-45-generic #74-Ubuntu
[ 355.356343] Hardware name: Hewlett-Packard HP 242 G2 Notebook PC/217B, BIOS B.0B 10/08/2013
[ 355.356344] 000000010000359d ffff88024eefdbd0 ffffffff81720eb6 0000000000000000
[ 355.356346] ffff88024eefdbe0 ffffffffa00ea88e 000000010000359c ffffffffa00f993c
[ 355.356347] 0000000000000000 ffffffffa01f305e ffff88024eefdc50 ffffffffa01f2fc9
[ 355.356349] Call Trace:
[ 355.356353] [<ffffffff81720eb6>] dump_stack+0x45/0x56
[ 355.356397] [<ffffffffa00ea88e>] KCL_DEBUG_OsDump+0xe/0x10 [fglrx]
[ 355.356431] [<ffffffffa00f993c>] firegl_hardwareHangRecovery+0x1c/0x30 [fglrx]
[ 355.356495] [<ffffffffa01f305e>] ? _ZN4Asic9WaitUntil15ResetASICIfHungEv+0x1e/0x30 [fglrx]
[ 355.356556] [<ffffffffa01f2fc9>] ? _ZN4Asic9WaitUntil15WaitForCompleteEv+0xb9/0x130 [fglrx]
[ 355.356614] [<ffffffffa01ef915>] ? _ZN4Asic19PM4ElapsedTimeStampEj14_LARGE_INTEGER12_QS_CP_RING_+0xd5/0x160 [fglrx]
[ 355.356644] [<ffffffffa01049f4>] ? MCIL_KernelMutex+0x134/0x320 [fglrx]
[ 355.356702] [<ffffffffa01f7859>] ? _ZN15ExecutableUnits35flush_all_and_invalidate_HDP_cachesE12_QS_CP_RING_+0xc9/0xf0 [fglrx]
[ 355.356759] [<ffffffffa01f74dc>] ? _ZN15ExecutableUnits14PM4idleGfxRingEv+0x1c/0x30 [fglrx]
[ 355.356810] [<ffffffffa01cbaef>] ? _ZN10QS_PRIVATE27synchronizeGraphicOperationEv+0x4f/0x90 [fglrx]
[ 355.356849] [<ffffffffa017c103>] ? _ZN9CMMlegacy29QSSynchronizeGraphicOperationEv+0x23/0x60 [fglrx]
[ 355.356886] [<ffffffffa017aa9d>] ? QSSynchronizeGraphicOperation+0xd/0x20 [fglrx]
[ 355.356914] [<ffffffffa0123728>] ? firegl_cmmqs_WaitForIdle+0x38/0x90 [fglrx]
[ 355.356939] [<ffffffffa00f7829>] ? firegl_lock_device+0x329/0x520 [fglrx]
[ 355.356966] [<ffffffffa00f7ada>] ? firegl_lock+0xba/0x210 [fglrx]
[ 355.356968] [<ffffffff810710e9>] ? ns_capable+0x29/0x50
[ 355.356995] [<ffffffffa00f7a20>] ? firegl_lock_device+0x520/0x520 [fglrx]
[ 355.357020] [<ffffffffa00f40cd>] ? firegl_ioctl+0x1ed/0x250 [fglrx]
[ 355.357043] [<ffffffffa00e21de>] ? ip_firegl_unlocked_ioctl+0xe/0x20 [fglrx]
[ 355.357046] [<ffffffff811d0e30>] ? do_vfs_ioctl+0x2e0/0x4c0
[ 355.357047] [<ffffffff811d1091>] ? SyS_ioctl+0x81/0xa0
[ 355.357050] [<ffffffff811becc9>] ? SyS_writev+0x49/0xc0
[ 355.357052] [<ffffffff8173196d>] ? system_call_fastpath+0x1a/0x1f

For more detailed information, please refer to the attached dmesg output file.