I upgraded the BIOS ( now sudo dmidecode -s bios-version shows 68PVU Ver. F.20 & bios-release-date shows 02/11/2011) but It still freezes.

This what I did to reproduce:

1. Boot with 3.18.x.x kernel in Unity
2. Start gnome-system-log & start monitoring
3. After few minutes crash occurs & it prints out some information
4. System freezes.

Other desktop-shells are not affected.

Crash log before the freeze:
--------------------------------------------------
Jan 30 19:41:13 Compaq-610 kernel: [  350.308886] ------------[ cut here ]------------
Jan 30 19:41:13 Compaq-610 kernel: [  350.308948] WARNING: CPU: 1 PID: 0 at /build/buildd/linux-3.18.0/drivers/gpu/drm/i915/intel_display.c:9916 intel_check_page_flip+0xa7/0xb0 [i915]()
Jan 30 19:41:13 Compaq-610 kernel: [  350.308953] Kicking stuck page flip: queued at 18405, now 18406
Jan 30 19:41:13 Compaq-610 kernel: [  350.308956] Modules linked in: ctr ccm btusb bnep rfcomm bluetooth uvcvideo snd_hda_codec_hdmi videobuf2_vmalloc snd_hda_codec_idt videobuf2_memops videobuf2_core snd_hda_codec_generic arc4 hp_wmi snd_hda_intel v4l2_common iwl3945 videodev sparse_keymap snd_hda_controller snd_hda_codec media iwlegacy snd_hwdep snd_pcm mac80211 snd_seq_midi snd_seq_midi_event snd_rawmidi coretemp snd_seq cfg80211 snd_seq_device i915 snd_timer hp_accel lis3lv02d joydev drm_kms_helper serio_raw snd input_polldev lpc_ich drm soundcore wmi i2c_algo_bit tpm_infineon 8250_fintek shpchp ppdev parport_pc video lp mac_hid parport hid_generic usbhid hid psmouse ahci libahci pata_acpi sky2
Jan 30 19:41:13 Compaq-610 kernel: [  350.309046] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.18.0-11-generic #12-Ubuntu
Jan 30 19:41:13 Compaq-610 kernel: [  350.309050] Hardware name: Hewlett-Packard Compaq 610/308A, BIOS 68PVU Ver. F.20 11/02/2011
Jan 30 19:41:13 Compaq-610 kernel: [  350.309054]  00000001 00000000 f4cf3e9c c16d30f6 f4cf3ee0 f4cf3ed0 c105fba2 f895ce94
Jan 30 19:41:13 Compaq-610 kernel: [  350.309066]  f4cf3efc 00000000 f895aa10 000026bc f8911a17 000026bc f8911a17 f406ec00
Jan 30 19:41:13 Compaq-610 kernel: [  350.309076]  f406ecfc f475b000 f4cf3ee8 c105fbf3 00000009 f4cf3ee0 f895ce94 f4cf3efc
Jan 30 19:41:13 Compaq-610 kernel: [  350.309088] Call Trace:
Jan 30 19:41:13 Compaq-610 kernel: [  350.309099]  [<c16d30f6>] dump_stack+0x41/0x52
Jan 30 19:41:13 Compaq-610 kernel: [  350.309107]  [<c105fba2>] warn_slowpath_common+0x82/0xa0
Jan 30 19:41:13 Compaq-610 kernel: [  350.309151]  [<f8911a17>] ? intel_check_page_flip+0xa7/0xb0 [i915]
Jan 30 19:41:13 Compaq-610 kernel: [  350.309193]  [<f8911a17>] ? intel_check_page_flip+0xa7/0xb0 [i915]
Jan 30 19:41:13 Compaq-610 kernel: [  350.309200]  [<c105fbf3>] warn_slowpath_fmt+0x33/0x40
Jan 30 19:41:13 Compaq-610 kernel: [  350.309242]  [<f8911a17>] intel_check_page_flip+0xa7/0xb0 [i915]
Jan 30 19:41:13 Compaq-610 kernel: [  350.309280]  [<f88e29ac>] i915_handle_vblank+0x4c/0x90 [i915]
Jan 30 19:41:13 Compaq-610 kernel: [  350.309318]  [<f88e6eca>] i965_irq_handler+0x23a/0x310 [i915]
Jan 30 19:41:13 Compaq-610 kernel: [  350.309326]  [<c10b09d6>] handle_irq_event_percpu+0x76/0x190
Jan 30 19:41:13 Compaq-610 kernel: [  350.309333]  [<c10b0b21>] handle_irq_event+0x31/0x50
Jan 30 19:41:13 Compaq-610 kernel: [  350.309339]  [<c10b34d0>] ? handle_level_irq+0xe0/0xe0
Jan 30 19:41:13 Compaq-610 kernel: [  350.309344]  [<c10b352d>] handle_edge_irq+0x5d/0xf0
Jan 30 19:41:13 Compaq-610 kernel: [  350.309351]  [<c10121d5>] handle_irq+0x65/0x80
Jan 30 19:41:13 Compaq-610 kernel: [  350.309355]  <IRQ>  [<c16dab6c>] do_IRQ+0x3c/0xd0
Jan 30 19:41:13 Compaq-610 kernel: [  350.309366]  [<c16da0b3>] common_interrupt+0x33/0x38
Jan 30 19:41:13 Compaq-610 kernel: [  350.309374]  [<c159a53b>] ? cpuidle_enter_state+0x5b/0x170
Jan 30 19:41:13 Compaq-610 kernel: [  350.309381]  [<c159a734>] cpuidle_enter+0x14/0x20
Jan 30 19:41:13 Compaq-610 kernel: [  350.309388]  [<c1099937>] cpu_startup_entry+0x2d7/0x370
Jan 30 19:41:13 Compaq-610 kernel: [  350.309395]  [<c10cce4a>] ? clockevents_register_device+0xaa/0x100
Jan 30 19:41:13 Compaq-610 kernel: [  350.309401]  [<c103fc46>] start_secondary+0x196/0x1e0
Jan 30 19:41:13 Compaq-610 kernel: [  350.309406] ---[ end trace dee513022f2d62cb ]---