Problem:
	Computer hangs after I leave it idle for a while.

System Info:
	Linux blackmamba 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

lspci:
	00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09)
	00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09)
	00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
	00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)
	00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
	00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
	00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
	00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4)
	00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4)
	00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
	00:1f.0 ISA bridge: Intel Corporation HM77 Express Chipset LPC Controller (rev 04)
	00:1f.2 RAID bus controller: Intel Corporation 82801 Mobile SATA Controller [RAID mode] (rev 04)
	00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
	01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Chelsea LP [Radeon HD 7730M]
	07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
	08:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01)

Using driver: 
	fglrx-updates

Error message (from syslog):

	May 10 22:12:02 blackmamba kernel: [29422.754134] <6>[fglrx] ASIC hang happened
	May 10 22:12:02 blackmamba kernel: [29422.754139] CPU: 6 PID: 1410 Comm: Xorg Tainted: PF        C O 3.13.0-24-generic #47-Ubuntu
	May 10 22:12:02 blackmamba kernel: [29422.754140] Hardware name: Dell Inc. Inspiron 7520/0DNMM8, BIOS A09 11/15/2012
	May 10 22:12:02 blackmamba kernel: [29422.754141]  00000001006f36d3 ffff8802525bbbd0 ffffffff81715ac4 0000000000000000
	May 10 22:12:02 blackmamba kernel: [29422.754144]  ffff8802525bbbe0 ffffffffa037388e 00000001006f36d2 ffffffffa038293c
	May 10 22:12:02 blackmamba kernel: [29422.754146]  0000000000000000 ffffffffa047c05e ffff8802525bbc50 ffffffffa047bfc9
	May 10 22:12:02 blackmamba kernel: [29422.754148] Call Trace:
	May 10 22:12:02 blackmamba kernel: [29422.754154]  [<ffffffff81715ac4>] dump_stack+0x45/0x56
	May 10 22:12:02 blackmamba kernel: [29422.754199]  [<ffffffffa037388e>] KCL_DEBUG_OsDump+0xe/0x10 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754231]  [<ffffffffa038293c>] firegl_hardwareHangRecovery+0x1c/0x30 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754298]  [<ffffffffa047c05e>] ? _ZN4Asic9WaitUntil15ResetASICIfHungEv+0x1e/0x30 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754360]  [<ffffffffa047bfc9>] ? _ZN4Asic9WaitUntil15WaitForCompleteEv+0xb9/0x130 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754422]  [<ffffffffa0478915>] ? _ZN4Asic19PM4ElapsedTimeStampEj14_LARGE_INTEGER12_QS_CP_RING_+0xd5/0x160 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754454]  [<ffffffffa038d9f4>] ? MCIL_KernelMutex+0x134/0x320 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754517]  [<ffffffffa0480859>] ? _ZN15ExecutableUnits35flush_all_and_invalidate_HDP_cachesE12_QS_CP_RING_+0xc9/0xf0 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754578]  [<ffffffffa04804dc>] ? _ZN15ExecutableUnits14PM4idleGfxRingEv+0x1c/0x30 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754635]  [<ffffffffa0454aef>] ? _ZN10QS_PRIVATE27synchronizeGraphicOperationEv+0x4f/0x90 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754681]  [<ffffffffa0405103>] ? _ZN9CMMlegacy29QSSynchronizeGraphicOperationEv+0x23/0x60 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754725]  [<ffffffffa0403a9d>] ? QSSynchronizeGraphicOperation+0xd/0x20 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754760]  [<ffffffffa03ac728>] ? firegl_cmmqs_WaitForIdle+0x38/0x90 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754790]  [<ffffffffa0380829>] ? firegl_lock_device+0x329/0x520 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754819]  [<ffffffffa0380ada>] ? firegl_lock+0xba/0x210 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754822]  [<ffffffff81070fb9>] ? ns_capable+0x29/0x50
	May 10 22:12:02 blackmamba kernel: [29422.754851]  [<ffffffffa0380a20>] ? firegl_lock_device+0x520/0x520 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754880]  [<ffffffffa037d0cd>] ? firegl_ioctl+0x1ed/0x250 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754902]  [<ffffffffa036b1de>] ? ip_firegl_unlocked_ioctl+0xe/0x20 [fglrx]
	May 10 22:12:02 blackmamba kernel: [29422.754905]  [<ffffffff811cc6e0>] ? do_vfs_ioctl+0x2e0/0x4c0
	May 10 22:12:02 blackmamba kernel: [29422.754908]  [<ffffffff8109dd84>] ? vtime_account_user+0x54/0x60
	May 10 22:12:02 blackmamba kernel: [29422.754910]  [<ffffffff811cc941>] ? SyS_ioctl+0x81/0xa0
	May 10 22:12:02 blackmamba kernel: [29422.754912]  [<ffffffff817266bf>] ? tracesys+0xe1/0xe6
	May 10 22:12:02 blackmamba kernel: [29422.754915] pubdev:0xffffffffa0a3e960, num of device:1 , name:fglrx, major 13, minor 35.
	May 10 22:12:02 blackmamba kernel: [29422.754916] device 0 : 0xffff880035900000 .
	May 10 22:12:02 blackmamba kernel: [29422.754918] Asic ID:0x682f, revision:0x29, MMIOReg:0xffffc90011280000.
	May 10 22:12:02 blackmamba kernel: [29422.754919] FB phys addr: 0xa0000000, MC :0xf400000000, Total FB size :0x80000000.
	May 10 22:12:02 blackmamba kernel: [29422.754920] gart table MC:0xf40f87c000, Physical:0xaf87c000, size:0x483000.
	May 10 22:12:02 blackmamba kernel: [29422.754922] mc_node :FB, total 1 zones
	May 10 22:12:02 blackmamba kernel: [29422.754923]     MC start:0xf400000000, Physical:0xa0000000, size:0xfd00000.
	May 10 22:12:02 blackmamba kernel: [29422.754924]     Mapped heap -- Offset:0x0, size:0xf878000, reference count:23, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754926]     Mapped heap -- Offset:0x0, size:0x1000000, reference count:1, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754927]     Mapped heap -- Offset:0xf878000, size:0x4000, reference count:1, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754928]     Mapped heap -- Offset:0xf87c000, size:0x484000, reference count:1, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754929] mc_node :INV_FB, total 1 zones
	May 10 22:12:02 blackmamba kernel: [29422.754930]     MC start:0xf40fd00000, Physical:0xafd00000, size:0x70300000.
	May 10 22:12:02 blackmamba kernel: [29422.754931]     Mapped heap -- Offset:0x702f4000, size:0xc000, reference count:1, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754932] mc_node :GART_USWC, total 3 zones
	May 10 22:12:02 blackmamba kernel: [29422.754933]     MC start:0xff90100000, Physical:0x0, size:0x60000000.
	May 10 22:12:02 blackmamba kernel: [29422.754935]     Mapped heap -- Offset:0x5f817000, size:0x7e9000, reference count:1, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754936]     Mapped heap -- Offset:0x0, size:0x2000000, reference count:9, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754937] mc_node :GART_CACHEABLE, total 3 zones
	May 10 22:12:02 blackmamba kernel: [29422.754938]     MC start:0xff60400000, Physical:0x0, size:0x2fd00000.
	May 10 22:12:02 blackmamba kernel: [29422.754939]     Mapped heap -- Offset:0x5900000, size:0x900000, reference count:2, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754941]     Mapped heap -- Offset:0x4c00000, size:0x900000, reference count:1, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754942]     Mapped heap -- Offset:0x4300000, size:0x900000, reference count:1, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754943]     Mapped heap -- Offset:0x5500000, size:0x400000, reference count:2, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754944]     Mapped heap -- Offset:0x4100000, size:0x200000, reference count:2, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754945]     Mapped heap -- Offset:0x3800000, size:0x900000, reference count:2, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754946]     Mapped heap -- Offset:0x2f00000, size:0x900000, reference count:3, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754947]     Mapped heap -- Offset:0x2600000, size:0x900000, reference count:3, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754949]     Mapped heap -- Offset:0x1d00000, size:0x900000, reference count:2, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754950]     Mapped heap -- Offset:0x1400000, size:0x900000, reference count:2, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754951]     Mapped heap -- Offset:0xb00000, size:0x900000, reference count:8, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754952]     Mapped heap -- Offset:0x200000, size:0x900000, reference count:11, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754953]     Mapped heap -- Offset:0x0, size:0x200000, reference count:24, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754954]     Mapped heap -- Offset:0xef000, size:0x11000, reference count:1, mapping count:0,
	May 10 22:12:02 blackmamba kernel: [29422.754955] mc_node :PEER_FB_GART, total 1 zones
	May 10 22:12:02 blackmamba kernel: [29422.754956]     MC start:0xfff0100000, Physical:0x0, size:0x1000.
	May 10 22:12:02 blackmamba kernel: [29422.754958] GRBM : 0xa2503028, SRBM : 0x200000c0 .
	May 10 22:12:02 blackmamba kernel: [29422.754961] CP_RB_BASE : 0xff901000, CP_RB_RPTR : 0x150 , CP_RB_WPTR :0x210.
	May 10 22:12:02 blackmamba kernel: [29422.754963] CP_IB1_BUFSZ:0x1360, CP_IB1_BASE_HI:0xff, CP_IB1_BASE_LO:0x908c3000.
	May 10 22:12:02 blackmamba kernel: [29422.754964] last submit IB buffer -- MC :0xff908c3000,phys:0x252297000.
	May 10 22:12:02 blackmamba kernel: [29422.754966] Dump the trace queue.
	May 10 22:12:02 blackmamba kernel: [29422.754967] End of dump

Let me know if I can contribute with tests to debug this problem.