如何始终获取桌面？重启后，它只显示鼠标光标和黑屏，除非我按 ctrl+alt+f1 并将其用作命令行，否则其他一切都不起作用。
版本：
Linux hpelitee800 3.11.0-15-generic #25-Ubuntu SMP Thu Jan 30 17:22:01 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
dmesg：
[ 2891.038975] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x503c000 ctx 1) at 0x503c220
[ 2945.012604] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[ 2945.012720] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x5094000 ctx 1) at 0x5094220
[ 2951.035024] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[ 2951.035109] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x503c000 ctx 1) at 0x503c220
[ 2969.970001] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[ 2969.970113] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x1074000 ctx 0) at 0x1074230
[ 2975.968416] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[ 2975.968509] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x5063000 ctx 1) at 0x5063220
[ 2981.966825] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[ 2981.966933] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x5094000 ctx 1) at 0x5094220
[ 2988.013224] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[ 2988.013310] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x507b000 ctx 1) at 0x507b220
[ 2994.011639] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[ 2994.011733] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x5094000 ctx 1) at 0x5094220
[ 2999.998048] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[ 2999.998123] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x507b000 ctx 1) at 0x507b220
[ 3000.018028] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for forcewake old ack to clear.