`dmesg`错误是什么：“不支持复合同步”是什么意思？
问题 ：我看到[ 20.473125] composite sync not supported ，当我运行dmesg时有几个这样的条目。 他们的意思是什么？
背景 ：我正在尝试调试我的笔记本电脑不会暂停的问题。 由于acpi似乎很高兴我可以从命令行轻松暂停，所以我转向追踪所有启动错误/警告。
所以我运行dmesg | grep not dmesg | grep not而且，除了其他shtuff，我得到：
728:[ 17.267120] composite sync not supported 733:[ 18.009061] composite sync not supported 740:[ 18.159289] registered panic notifier 749:[ 18.162500] vga16fb: not registering due to another framebuffer present 757:[ 18.598251] composite sync not supported 776:[ 20.473125] composite sync not supported 777:[ 20.932266] composite sync not supported 778:[ 28.350231] composite sync not supported 779:[ 28.924913] composite sync not supported 780:[ 35.480658] composite sync not supported
第一次出现（第728行）周围的几行的完整日志列在我post的底部（我很乐意包含其他内容）。 可能导致这种情况的任何想法？ 我读过几个网站：
- Ubuntuforums＃1
- IRC聊天＃1
一篇post谈到?? Adobe flash ?? 造成这个错误？
其他一些人也认为它可能与nvidia相关的问题，但我有戴尔Latitude D630与集成的英特尔图形 – 所以nvidia不是问题。
[ 17.207142] phy0: Selected rate control algorithm 'minstrel' [ 17.207833] Registered led device: b43-phy0::tx [ 17.207849] Registered led device: b43-phy0::rx [ 17.207865] Registered led device: b43-phy0::radio [ 17.207927] Broadcom 43xx driver loaded [ Features: PL, Firmware-ID: FW13 ] [ 17.267120] composite sync not supported [ 17.415795] EXT4-fs (sda2): mounted filesystem with ordered data mode [ 17.602131] [drm] initialized overlay support [ 17.620201] input: DualPoint Stick as /devices/platform/i8042/serio1/input/input7 [ 17.641192] input: AlpsPS/2 ALPS DualPoint TouchPad as /devices/platform/i8042/serio1/input/input8 [ 18.009061] composite sync not supported [ 18.106042] pcmcia_socket pcmcia_socket0: cs: IO port probe 0x100-0x3af: clean. [ 18.108115] pcmcia_socket pcmcia_socket0: cs: IO port probe 0x3e0-0x4ff: clean. [ 18.108941] pcmcia_socket pcmcia_socket0: cs: IO port probe 0x820-0x8ff: clean. [ 18.109676] pcmcia_socket pcmcia_socket0: cs: IO port probe 0xc00-0xcf7: clean. [ 18.110356] pcmcia_socket pcmcia_socket0: cs: IO port probe 0xa00-0xaff: clean. [ 18.159286] fb0: inteldrmfb frame buffer device [ 18.159289] registered panic notifier [ 18.160218] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/LNXVIDEO:01/input/input9 [ 18.160286] ACPI: Video Device [VID1] (multi-head: yes rom: no post: no) [ 18.160334] ACPI Warning for \_SB_.PCI0.VID2._DOD: Return Package has no elements (empty) (20090903/nspredef-433) [ 18.160432] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/LNXVIDEO:02/input/input10 [ 18.160491] ACPI: Video Device [VID2] (multi-head: yes rom: no post: no) [ 18.160539] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 [ 18.162494] vga16fb: initializing [ 18.162497] vga16fb: mapped to 0xc00a0000 [ 18.162500] vga16fb: not registering due to another framebuffer present [ 18.176091] HDA Intel 0000:00:1b.0: PCI INT A -> GSI 21 (level, low) -> IRQ 21 [ 18.176123] HDA Intel 0000:00:1b.0: setting latency timer to 64 [ 18.285752] input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1b.0/input/input11 [ 18.312497] input: HDA Intel Mic at Ext Left Jack as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12 [ 18.312586] input: HDA Intel HP Out at Ext Left Jack as /devices/pci0000:00/0000:00:1b.0/sound/card0/input13 [ 18.328043] usbcore: registered new interface driver ndiswrapper [ 18.460909] Console: switching to colour frame buffer device 180x56 [ 18.598251] composite sync not supported
好吧，还是不知道这意味着什么。 然而 ，为了让它消失，我按照这里的说明并将选项nomodeset添加到grub。 现在这些错误以及其他一些我觉得奇怪的事情，如：
vga16fb: not registering due to another framebuffer present
和别的。 希望这有助于其他人……我不会给自己一个答案。 如果有人可以解释这个错误，并且（？或许？）它与Xorg的合成有什么关系 ，那么我会高兴地奖励积分（或奖励 – 如果我得到足够的积分就可以这样做）。 ~m
请注意，我至少添加了Xorg扩展来禁用合成，这使得只读取composite sync not supported的五行中的一行消失了。 所以我解除了这个改变并继续搜索，直到我找到了上面的grub选项，删除了所有的错误。