Bug#703715:
I have the same issue in Debian Wheezy 7.0 release. The random freezes
can only reverted by restarting X in tty.
I have an ivybridge Lenovo Y580 system.
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)
00:1c.3 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset
Family PCI Express Root Port 4 (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 HM76 Express Chipset LPC
Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family
6-port SATA Controller [AHCI 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: NVIDIA Corporation Device 0fd4 (rev ff)
02:00.0 Ethernet controller: Atheros Communications Inc. AR8161
Gigabit Ethernet (rev 08)
03:00.0 Network controller: Intel Corporation Centrino Wireless-N 2200 (rev c4)
04:00.0 System peripheral: JMicron Technology Corp. SD/MMC Host
Controller (rev 30)
04:00.2 SD Host controller: JMicron Technology Corp. Standard SD Host
Controller (rev 30)
04:00.3 System peripheral: JMicron Technology Corp. MS Host Controller (rev 30)
04:00.4 System peripheral: JMicron Technology Corp. xD Host Controller (rev 30)
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