I'm on a Latitude e6430s. The keyboard and mouse don't respond at all, and all animations stop. (Incidentally, I can't get REISUB to work at any time, even when there isn't a problem -- might be related to the fact that SysRq and Prnt Scrn are Fn-keys on the laptop keyboard.)
It happens about every 2-3 hours, but sometimes immediately after resetting. For a bit, I was able to get it to happen consistently when I restored a particular session of Chrome tabs.
Any help would be greatly appreciated!
$uname -a Linux gabe-dev 3.2.0-34-generic #53-Ubuntu SMP Thu Nov 15 10:48:16 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
Here's some of lshw (I don't know what's relevant)
gabe-dev description: Laptop product: Latitude E6430s () vendor: Winbond Electronics version: 01 serial: H1789W1 width: 64 bits capabilities: smbios-2.7 dmi-2.7 vsyscall32 configuration: boot=normal chassis=laptop uuid=44454C4C-3100-1037-8038-C8C04F395731 *-core description: Motherboard product: 0N9T9J vendor: Winbond Electronics physical id: 0 version: A00 serial: /H1789W1/CN129612C8009C/ *-firmware description: BIOS vendor: Winbond Electronics physical id: 0 version: A06 date: 10/08/2012 size: 64KiB capacity: 13MiB capabilities: pci pnp upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb smartbattery biosbootspecification netboot *-cpu description: CPU product: Intel(R) Core(TM) i7-3520M CPU @ 2.90GHz vendor: Intel Corp. physical id: 54 bus info: cpu@0 version: Intel(R) Core(TM) i7-3520M CPU @ 2.90GHz slot: SOCKET 0 size: 1200MHz capacity: 1200MHz width: 64 bits clock: 100MHz ... *-pci description: Host bridge product: Ivy Bridge DRAM Controller vendor: Intel Corporation physical id: 100 bus info: pci@0000:00:00.0 version: 09 width: 32 bits clock: 33MHz configuration: driver=agpgart-intel resources: irq:0 *-display description: VGA compatible controller product: Ivy Bridge Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 09 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:46 memory:f6400000-f67fffff memory:e0000000-efffffff ioport:f000(size=64) ...
$lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09)