I have just experienced this issue today.
Dell Latitude 6330
CPU: i3-3110M
GPU: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
Ubuntu 14.04.2 with intel linux graphics driver 1.0.7

syslog:

Apr 12 22:37:34  kernel: [37436.202310] CPU: 0 PID: 6036 Comm: Xorg Tainted: G           OE 3.16.0-34-generic #45~14.04.1-Ubuntu
Apr 12 22:37:34  kernel: [37436.202311] Hardware name: Dell Inc. Latitude E6330/0XP1RW, BIOS A14 09/24/2014
Apr 12 22:37:34  kernel: [37436.202315]  0000000000000009 ffff8801571df9a8 ffffffff8176432f 0000000000000000
Apr 12 22:37:34  kernel: [37436.202317]  ffff8801571df9e0 ffffffff8106dd9d 0000000000000000 ffff880035d6e000
Apr 12 22:37:34  kernel: [37436.202319]  ffff8800c9d58210 ffff8801fef53000 ffff8801fef53368 ffff8801571df9f0
Apr 12 22:37:34  kernel: [37436.202320] Call Trace:
Apr 12 22:37:34  kernel: [37436.202328]  [<ffffffff8176432f>] dump_stack+0x45/0x56
Apr 12 22:37:34  kernel: [37436.202333]  [<ffffffff8106dd9d>] warn_slowpath_common+0x7d/0xa0
Apr 12 22:37:34  kernel: [37436.202336]  [<ffffffff8106de7a>] warn_slowpath_null+0x1a/0x20
Apr 12 22:37:34  kernel: [37436.202363]  [<ffffffffc05cec61>] intel_crtc_wait_for_pending_flips+0x171/0x180 [i915]
Apr 12 22:37:34  kernel: [37436.202369]  [<ffffffff810b4d70>] ? prepare_to_wait_event+0x100/0x100
Apr 12 22:37:34  kernel: [37436.202394]  [<ffffffffc05d84d9>] intel_crtc_set_config+0x959/0xdb0 [i915]
Apr 12 22:37:34  kernel: [37436.202418]  [<ffffffffc0444401>] drm_mode_set_config_internal+0x61/0xe0 [drm]
Apr 12 22:37:34  kernel: [37436.202428]  [<ffffffffc0418b33>] restore_fbdev_mode+0xb3/0xe0 [drm_kms_helper]
Apr 12 22:37:34  kernel: [37436.202437]  [<ffffffffc041a775>] drm_fb_helper_restore_fbdev_mode_unlocked+0x25/0x70 [drm_kms_helper]
Apr 12 22:37:34  kernel: [37436.202446]  [<ffffffffc041a7e2>] drm_fb_helper_set_par+0x22/0x50 [drm_kms_helper]
Apr 12 22:37:34  kernel: [37436.202450]  [<ffffffff814015d1>] fb_set_var+0x191/0x430
Apr 12 22:37:34  kernel: [37436.202453]  [<ffffffff810aa740>] ? update_curr+0x80/0x180
Apr 12 22:37:34  kernel: [37436.202457]  [<ffffffff813f8611>] fbcon_blank+0x1d1/0x2d0
Apr 12 22:37:34  kernel: [37436.202461]  [<ffffffff8109ebdd>] ? ttwu_do_activate.constprop.85+0x5d/0x70
Apr 12 22:37:34  kernel: [37436.202466]  [<ffffffff81483948>] do_unblank_screen+0xb8/0x1f0
Apr 12 22:37:34  kernel: [37436.202469]  [<ffffffff814798ca>] complete_change_console+0x5a/0xe0
Apr 12 22:37:34  kernel: [37436.202471]  [<ffffffff8147a8ec>] vt_ioctl+0xf9c/0x11b0
Apr 12 22:37:34  kernel: [37436.202475]  [<ffffffff8146e13d>] tty_ioctl+0x26d/0xbb0
Apr 12 22:37:34  kernel: [37436.202478]  [<ffffffff812116e8>] ? fsnotify+0x228/0x2f0
Apr 12 22:37:34  kernel: [37436.202482]  [<ffffffff811e7090>] do_vfs_ioctl+0x2e0/0x4c0
Apr 12 22:37:34  kernel: [37436.202485]  [<ffffffff811d67c1>] ? __sb_end_write+0x31/0x60
Apr 12 22:37:34  kernel: [37436.202488]  [<ffffffff811e72f1>] SyS_ioctl+0x81/0xa0
Apr 12 22:37:34  kernel: [37436.202493]  [<ffffffff8176ca6d>] system_call_fastpath+0x1a/0x1f
Apr 12 22:37:34  kernel: [37436.202495] ---[ end trace ebc18d8b83ced03d ]---
Apr 12 22:37:34  kernel: [37436.202500] [drm:intel_pipe_set_base] *ERROR* pipe is still busy with an old pageflip