------------[ cut here ]------------
WARNING: CPU: 0 PID: 158 at /usr/local/src/linux-libre/drivers/gpu/drm/i915/i915_gem.c:5129 i915_gem_track_fb+0xe8/0x17e()
WARN_ON(new->frontbuffer_bits & frontbuffer_bits)
CPU: 0 PID: 158 Comm: Xorg Not tainted 4.4.0-gnu #1
Hardware name:    /i845GE-W83627, BIOS 6.00 PG 10/17/2002
 c1214e39 c102db6d c15c4696 f3d6bdb8 0000009e c15f24f0 00001409 c12fa444
 00000000 e6fc4c00 00000000 e6fc4900 c102dbeb 00000009 f3d6bda0 c15c4696
 f3d6bdb8 c12fa444 c15f24f0 00001409 c15c4696 c15f2a5c e6fc4900 00000080
Call Trace:
 [<c1214e39>] ? dump_stack+0xa/0x21
 [<c102db6d>] ? warn_slowpath_common+0x6f/0x9d
 [<c12fa444>] ? i915_gem_track_fb+0xe8/0x17e
 [<c102dbeb>] ? warn_slowpath_fmt+0x33/0x37
 [<c12fa444>] ? i915_gem_track_fb+0xe8/0x17e
 [<c1336ad5>] ? intel_overlay_put_image+0x11b1/0x135d
 [<c1335924>] ? intel_overlay_switch_off+0x2a7/0x2a7
 [<c12b5ba3>] ? drm_ioctl+0xfc/0x477
 [<c1335924>] ? intel_overlay_switch_off+0x2a7/0x2a7
 [<c1001c32>] ? get_sigframe.isra.8.constprop.9+0xe2/0x144
 [<c1036f2b>] ? __set_current_blocked+0x13/0x23
 [<c1036fa0>] ? signal_setup_done+0x5a/0x8a
 [<c1007793>] ? fpstate_init+0x10/0x47
 [<c100893f>] ? __fpu__restore_sig+0x336/0x422
 [<c12b5aa7>] ? drm_ioctl_permit+0x83/0x83
 [<c10c80f1>] ? do_vfs_ioctl+0x337/0x4ee
 [<c10c82df>] ? SyS_ioctl+0x37/0x56
 [<c100108c>] ? do_fast_syscall_32+0x7f/0x105
 [<c14e1ced>] ? sysenter_past_esp+0x36/0x55
---[ end trace 4ae125af7617a679 ]---
[drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe A FIFO underrun
------------[ cut here ]------------
WARNING: CPU: 0 PID: 158 at /usr/local/src/linux-libre/drivers/gpu/drm/i915/i915_gem.c:5129 i915_gem_track_fb+0xe8/0x17e()
WARN_ON(new->frontbuffer_bits & frontbuffer_bits)
CPU: 0 PID: 158 Comm: Xorg Tainted: G        W       4.4.0-gnu #1
Hardware name:    /i845GE-W83627, BIOS 6.00 PG 10/17/2002
 c1214e39 c102db6d c15c4696 f3d6bdb8 0000009e c15f24f0 00001409 c12fa444
 00000000 e6fc4900 00000000 e6fc4300 c102dbeb 00000009 f3d6bda0 c15c4696
 f3d6bdb8 c12fa444 c15f24f0 00001409 c15c4696 c15f2a5c e6fc4300 00000080
Call Trace:
 [<c1214e39>] ? dump_stack+0xa/0x21
 [<c102db6d>] ? warn_slowpath_common+0x6f/0x9d
 [<c12fa444>] ? i915_gem_track_fb+0xe8/0x17e
 [<c102dbeb>] ? warn_slowpath_fmt+0x33/0x37
 [<c12fa444>] ? i915_gem_track_fb+0xe8/0x17e
 [<c1336ad5>] ? intel_overlay_put_image+0x11b1/0x135d
 [<c1335924>] ? intel_overlay_switch_off+0x2a7/0x2a7
 [<c12b5ba3>] ? drm_ioctl+0xfc/0x477
 [<c1335924>] ? intel_overlay_switch_off+0x2a7/0x2a7
 [<c1064b4f>] ? timekeeping_update+0x11a/0x197
 [<c10467a5>] ? sched_clock_local.constprop.5+0x2f/0x12d
 [<c12b5aa7>] ? drm_ioctl_permit+0x83/0x83
 [<c10c80f1>] ? do_vfs_ioctl+0x337/0x4ee
 [<c10652f1>] ? ktime_get+0x44/0x116
 [<c1021750>] ? lapic_next_event+0x10/0x13
 [<c106bdfd>] ? clockevents_program_event+0x8a/0x14f
 [<c121a29a>] ? timerqueue_add+0x4c/0xa0
 [<c10c82df>] ? SyS_ioctl+0x37/0x56
 [<c100108c>] ? do_fast_syscall_32+0x7f/0x105
 [<c14e1ced>] ? sysenter_past_esp+0x36/0x55
---[ end trace 4ae125af7617a67a ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 158 at /usr/local/src/linux-libre/drivers/gpu/drm/i915/i915_gem.c:5129 i915_gem_track_fb+0xe8/0x17e()
WARN_ON(new->frontbuffer_bits & frontbuffer_bits)
CPU: 0 PID: 158 Comm: Xorg Tainted: G        W       4.4.0-gnu #1
Hardware name:    /i845GE-W83627, BIOS 6.00 PG 10/17/2002
 c1214e39 c102db6d c15c4696 f3d6bdb8 0000009e c15f24f0 00001409 c12fa444
 00000000 e6fc4c00 00000000 e6fc4900 c102dbeb 00000009 f3d6bda0 c15c4696
 f3d6bdb8 c12fa444 c15f24f0 00001409 c15c4696 c15f2a5c e6fc4900 00000080
Call Trace:
 [<c1214e39>] ? dump_stack+0xa/0x21
 [<c102db6d>] ? warn_slowpath_common+0x6f/0x9d
 [<c12fa444>] ? i915_gem_track_fb+0xe8/0x17e
 [<c102dbeb>] ? warn_slowpath_fmt+0x33/0x37
 [<c12fa444>] ? i915_gem_track_fb+0xe8/0x17e
 [<c1336ad5>] ? intel_overlay_put_image+0x11b1/0x135d
 [<c1335924>] ? intel_overlay_switch_off+0x2a7/0x2a7
 [<c12b5ba3>] ? drm_ioctl+0xfc/0x477
 [<c1335924>] ? intel_overlay_switch_off+0x2a7/0x2a7
 [<c1064b4f>] ? timekeeping_update+0x11a/0x197
 [<c10467a5>] ? sched_clock_local.constprop.5+0x2f/0x12d
 [<c12b5aa7>] ? drm_ioctl_permit+0x83/0x83
 [<c10c80f1>] ? do_vfs_ioctl+0x337/0x4ee
 [<c10652f1>] ? ktime_get+0x44/0x116
 [<c1021750>] ? lapic_next_event+0x10/0x13
 [<c106bdfd>] ? clockevents_program_event+0x8a/0x14f
 [<c121a29a>] ? timerqueue_add+0x4c/0xa0
 [<c10c82df>] ? SyS_ioctl+0x37/0x56
 [<c100108c>] ? do_fast_syscall_32+0x7f/0x105
 [<c14e1ced>] ? sysenter_past_esp+0x36/0x55
---[ end trace 4ae125af7617a67b ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 158 at /usr/local/src/linux-libre/drivers/gpu/drm/i915/i915_gem.c:4508 i915_gem_free_object+0x27e/0x2b6()
WARN_ON(obj->frontbuffer_bits)
CPU: 0 PID: 158 Comm: Xorg Tainted: G        W       4.4.0-gnu #1
Hardware name:    /i845GE-W83627, BIOS 6.00 PG 10/17/2002
 c1214e39 c102db6d c15c4696 f3d6bde8 0000009e c15f24f0 0000119c c12f8a02
 e6fc4be0 e6fc4c00 e6fc4c70 00000000 c102dbeb 00000009 f3d6bdd0 c15c4696
 f3d6bde8 c12f8a02 c15f24f0 0000119c c15c4696 c1617e29 f69a8000 00000033
Call Trace:
 [<c1214e39>] ? dump_stack+0xa/0x21
 [<c102db6d>] ? warn_slowpath_common+0x6f/0x9d
 [<c12f8a02>] ? i915_gem_free_object+0x27e/0x2b6
 [<c102dbeb>] ? warn_slowpath_fmt+0x33/0x37
 [<c12f8a02>] ? i915_gem_free_object+0x27e/0x2b6
 [<c12b46ad>] ? drm_gem_object_free+0x1d/0x31
 [<c12b47ac>] ? drm_gem_object_handle_unreference_unlocked+0xc2/0xcb
 [<c12b4a4a>] ? drm_gem_handle_delete+0x99/0xdd
 [<c12b4e86>] ? drm_gem_object_lookup+0x8f/0x8f
 [<c12b5ba3>] ? drm_ioctl+0xfc/0x477
 [<c12b4e86>] ? drm_gem_object_lookup+0x8f/0x8f
 [<c108e3f2>] ? free_pages_prepare+0x17e/0x24e
 [<c10a3401>] ? tlb_finish_mmu+0x19/0x29
 [<c108e3f2>] ? free_pages_prepare+0x17e/0x24e
 [<c12b5aa7>] ? drm_ioctl_permit+0x83/0x83
 [<c10c80f1>] ? do_vfs_ioctl+0x337/0x4ee
 [<c10b5a51>] ? kmem_cache_free+0xa1/0xa3
 [<c10a7178>] ? remove_vma+0x31/0x36
 [<c10a8dc5>] ? do_munmap+0x1ea/0x320
 [<c10c82df>] ? SyS_ioctl+0x37/0x56
 [<c100108c>] ? do_fast_syscall_32+0x7f/0x105
 [<c14e1ced>] ? sysenter_past_esp+0x36/0x55
---[ end trace 4ae125af7617a67c ]---