进入 qt webkit directfb 报错如下：

[Franklin]

(!?!) *** BUG [unknown object [2] in 'Layer Context Pool'] *** [object.c:149 in object_reference_watcher()]
(!!!) *** WARNING [still objects in 'Layer Context Pool'] *** [object.c:241 in fusion_object_pool_destroy()]
(!!!) *** WARNING [still objects in 'Surface Pool'] *** [object.c:241 in fusion_object_pool_destroy()]
(!) FUSION_PROPERTY_CEDE --> Input/output error
[ 2410.310000] TMVSSDISPLAY: TMVSSDISPLAYNo swap chain
0, 4 )
[ 2410.580000] BUG: Bad page map in process mainmenu pte:0c00079f pmd:1eafe031
[ 2410.590000] page:80f80000 count:1 mapcount:-1 mapping:(null) index:0x0
[ 2410.590000] page flags: 0x4014(referenced|dirty|head)
[ 2410.600000] addr:2f320000 vm_flags:400800ff anon_vma:(null) mapping:9f909978 index:c000
[ 2410.610000] vma->vm_file->f_op->mmap: cnxt_lnx_ukal_mmap+0x0/0x188 [lnxKKALDrv]
[ 2410.610000] [<80032418>] (unwind_backtrace+0x0/0xf0) from [<800a27c0>] (print_bad_pte+0x138/0x19c)
[ 2410.620000] [<800a27c0>] (print_bad_pte+0x138/0x19c) from [<800a4464>] (unmap_vmas+0x534/0x758)
[ 2410.630000] [<800a4464>] (unmap_vmas+0x534/0x758) from [<800a9790>] (exit_mmap+0xd8/0x158)
[ 2410.640000] [<800a9790>] (exit_mmap+0xd8/0x158) from [<80048444>] (mmput+0x3c/0x108)
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什么原因？