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M. Tibbits
Asked: 2011-01-23 13:23:28 +0800 CST

`dmesg` 错误：“不支持复合同步”是什么意思？

  • 772

问题：我[ 20.473125] composite sync not supported在运行时看到了几个这样的条目dmesg。他们的意思是什么？

背景：我正在尝试调试笔记本电脑无法挂起的问题。由于 acpi 看起来很开心，而且我可以从命令行轻松挂起，因此我转向跟踪所有启动错误/警告。

所以我跑步dmesg | grep not，除其他外，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

第一次出现的几行（第 728 行）的完整日志列在我的帖子底部（我很乐意包括其他任何内容）。有什么想法可能导致这种情况吗？我读过几个网站：

  1. Ubuntu 论坛 #1
  2. IRC 聊天 #1

一篇文章谈到 ??Adobe flash?? 导致这个错误？

其他一些人还建议这可能是与 nvidia 相关的问题，但我有一个带有集成 Intel 显卡的 Dell Latitude D630 - 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
boot

1 个回答

  1. Best Answer

    嗯，还是不知道什么意思。 但是，为了让它消失，我按照这里的说明添加了nomodesetgrub 选项。现在这些错误以及我认为看起来很奇怪的其他一些事情都消失了，比如：

    vga16fb: not registering due to another framebuffer present

    和别的。希望这对其他人有所帮助......我不会给自己奖励答案。如果有人能解释这个错误，以及（？也许？）它与Xorg 的合成有何关系，那么我会很高兴地奖励积分（或赏金——如果我得到足够的积分的话）。〜米

    请注意，我至少添加了 Xorg 扩展来禁用合成，这只会使读取的五行之一composite sync not supported消失。所以我取消了这个更改并继续搜索，直到找到上面的 grub 选项，它删除了所有错误。

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