Actually, the XorgLog.txt shows more definite problems:
[181434.889] (WW) modeset(0): flip queue failed: Device or resource busy [181434.889] (WW) modeset(0): Page flip failed: Device or resource busy [181434.889] (EE) modeset(0): present flip failed [181434.989] (WW) modeset(0): flip queue failed: Device or resource busy [181434.989] (WW) modeset(0): Page flip failed: Device or resource busy [181434.989] (EE) modeset(0): present flip failed [181435.105] (WW) modeset(0): flip queue failed: Device or resource busy [181435.105] (WW) modeset(0): Page flip failed: Device or resource busy [181435.106] (EE) modeset(0): present flip failed [181435.205] (WW) modeset(0): flip queue failed: Device or resource busy [181435.205] (WW) modeset(0): Page flip failed: Device or resource busy [181435.205] (EE) modeset(0): present flip failed
That might be Xorg's fault (comment #8) or it might be the kernel's fault.
Actually, the XorgLog.txt shows more definite problems:
[181434.889] (WW) modeset(0): flip queue failed: Device or resource busy
[181434.889] (WW) modeset(0): Page flip failed: Device or resource busy
[181434.889] (EE) modeset(0): present flip failed
[181434.989] (WW) modeset(0): flip queue failed: Device or resource busy
[181434.989] (WW) modeset(0): Page flip failed: Device or resource busy
[181434.989] (EE) modeset(0): present flip failed
[181435.105] (WW) modeset(0): flip queue failed: Device or resource busy
[181435.105] (WW) modeset(0): Page flip failed: Device or resource busy
[181435.106] (EE) modeset(0): present flip failed
[181435.205] (WW) modeset(0): flip queue failed: Device or resource busy
[181435.205] (WW) modeset(0): Page flip failed: Device or resource busy
[181435.205] (EE) modeset(0): present flip failed
That might be Xorg's fault (comment #8) or it might be the kernel's fault.