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笔记本电脑 LVDS（内置）显示器在 14.04 下无法识别

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笔记本电脑 LVDS（内置）显示器在 14.04 下无法识别

我一直在我的电脑上运行 Ubuntu 10.04戴尔 Vostro 1220自 2010 年以来，使用和不使用各种外部 VGA 设备都没有问题。我终于尝试全新安装 14.04，我的笔记本电脑的内置显示器无法工作，除非我添加nomodeset以下选项/etc/default/grub：

GRUB_CMDLINE_LINUX="nomodeset"

这使我可以启动，但不能更改分辨率，也不能识别外部 VGA 显示器。在谷歌搜索问题后，我了解到我的 Mobile Intel® Graphics Media Accelerator X4500MHD 的适当驱动程序似乎是i915 数字版权管理我还了解到，这nomodeset很可能阻止了我的 LVDS 屏幕上的显示模式被更改，并且外部 VGA 被识别，因为它禁用了知识管理系统。因此，我安装了英特尔 Linux 图形安装程序 1.0.7，运行它，经过反复试验后将启动选项改为/etc/default/grub......

GRUB_CMDLINE_LINUX="i915.modeset=1 i915.lvds_channel_mode=2 video=VGA-1:1280x1024Me video=LVDS-1:1024x768Me"

现在我的系统可以正常识别外部 VGA，但内置 LVDS 屏幕是黑屏。即使我在没有插入 VGA 的情况下启动，也是如此。

以下是 的输出xrandr：

xrandr: Output LVDS1 is not disconnected but has no modes 
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767 
LVDS1 connected (normal left inverted right x axis y axis) 
VGA1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm 
     1920x1080      60.0*+    
     1680x1050      60.0      
     1280x1024      75.0 60.0      
     1440x900       59.9      
     1280x960       60.0      
     1024x768       75.1     70.1     60.0      
     ... 
     720x400        70.1   
DP1 disconnected (normal left inverted right x axis y axis) 
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

如果我尝试向 LVDS1 添加一种模式，会发生以下情况...

$ xrandr --addmode LVDS1 1024x768
xrandr: Output LVDS1 is not disconnected but has no modes

$ xrandr --output LVDS1 --mode 1024x768 --pos 0x0 --output VGA1 --mode 1280x1024 --rotate normal
xrandr: Configure crtc 0 failed

$ xrandr --auto
xrandr: Configure crtc 0 failed

我现在真的不知道自己在做什么。有人能告诉我如何让 Ubuntu 14.04 或其他受支持的版本识别配备 X4500MHD 显卡的笔记本电脑上的 VGA 和 LVDS，或者如何进一步解决此问题，或者阅读材料以了解我没有得到什么吗？

或者，是否有推荐的程序可以将 14.04 中的视频驱动程序和/或内核降级到不会破坏对我的视频卡的支持的早期版本？

谢谢。

我不想成为那些问模糊问题的人之一。以下是我能想到的所有可能与问题相关的输出。我很乐意转储任何人认为有用的任何其他内容。

以下是我正在运行的内容：

echo -n "Release: " && lsb_release -sd && echo -n "Kernel: " || cat /etc/*release && uname -s -r && echo -n "Unity: " && unity --version && echo && /usr/lib/nux/unity_support_test -p -f && echo || echo &&  dpkg -s mesa-utils && echo || echo && echo "Xserver xorg core:" && apt-cache policy xserver-xorg-core | grep Installed && echo 

Release: Ubuntu 14.04.1 LTS 
Kernel: Linux 3.13.0-39-generic 
Unity: The program 'unity' is currently not installed. You can install it by typing: sudo apt-get install unity

Package: mesa-utils 
Status: install ok installed 
Priority: optional 
Section: x11 
Installed-Size: 130 
Maintainer: Ubuntu Developers <[email protected]> 
Architecture: amd64 
Source: mesa-demos 
Version: 8.1.0-2 
Replaces: xbase-clients (<< 6.8.2-38) 
Depends: libc6 (>= 2.14), libgl1-mesa-glx | libgl1, libx11-6 
Description: Miscellaneous Mesa GL utilities  This package provides several basic GL utilities built by Mesa, including  glxinfo and glxgears. 
Original-Maintainer: Debian X Strike Force <[email protected]> 
Homepage: http://mesa3d.org/

Xserver xorg core:
   Installed: 2:1.15.1-0ubuntu2.1

LVDS 声称已连接。

~$ for p in /sys/class/drm/*/status; do con=${p%/status}; echo -n "${con#*/card?-}: "; cat $p; done

DP-1: disconnected
LVDS-1: connected
VGA-1: connected

GPU 似乎没有报告任何错误：

~# cat /sys/kernel/debug/dri/0/i915_error_state 
no error state collected
~# cat /sys/kernel/debug/dri/64/i915_error_state 
no error state collected

视频相关输出来自lspci：

00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller])
    Subsystem: Dell Device 02d8
    Flags: bus master, fast devsel, latency 0, IRQ 45
    Memory at f6c00000 (64-bit, non-prefetchable) [size=4M]
    Memory at e0000000 (64-bit, prefetchable) [size=256M]
    I/O ports at efe8 [size=8]
    Expansion ROM at <unassigned> [disabled]
    Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [d0] Power Management version 3
    Kernel driver in use: i915

00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
    Subsystem: Dell Device 02d8
    Flags: bus master, fast devsel, latency 0
    Memory at f6b00000 (64-bit, non-prefetchable) [size=1M]
    Capabilities: [d0] Power Management version 3

输出自lshw -C video -sanitize：

*-display:0
     description: VGA compatible controller
     product: Mobile 4 Series Chipset Integrated Graphics Controller
     vendor: Intel Corporation
     physical id: 2
     bus info: pci@0000:00:02.0
     version: 07
     width: 64 bits
     clock: 33MHz
     capabilities: msi pm vga_controller bus_master cap_list rom
     configuration: driver=i915 latency=0
     resources: irq:45 memory:f6c00000-f6ffffff memory:e0000000-efffffff ioport:efe8(size=8)
*-display:1 UNCLAIMED
     description: Display controller
     product: Mobile 4 Series Chipset Integrated Graphics Controller
     vendor: Intel Corporation
     physical id: 2.1
     bus info: pci@0000:00:02.1
     version: 07
     width: 64 bits
     clock: 33MHz
     capabilities: pm bus_master cap_list
     configuration: latency=0
     resources: memory:f6b00000-f6bfffff

以下是 i915 视频模块的参数，据我所知，这是我的芯片组的模块……

~# for i in /sys/module/i915/parameters/*;do echo ${i}=`cat $i`;done

/sys/module/i915/parameters/disable_display=N
/sys/module/i915/parameters/disable_power_well=1
/sys/module/i915/parameters/disable_vtd_wa=N
/sys/module/i915/parameters/enable_cmd_parser=1
/sys/module/i915/parameters/enable_fbc=-1
/sys/module/i915/parameters/enable_hangcheck=Y
/sys/module/i915/parameters/enable_ips=1
/sys/module/i915/parameters/enable_ppgtt=0
/sys/module/i915/parameters/enable_psr=0
/sys/module/i915/parameters/enable_rc6=0
/sys/module/i915/parameters/fastboot=N
/sys/module/i915/parameters/invert_brightness=0
/sys/module/i915/parameters/lvds_channel_mode=2
/sys/module/i915/parameters/lvds_downclock=0
/sys/module/i915/parameters/lvds_use_ssc=-1
/sys/module/i915/parameters/modeset=1
/sys/module/i915/parameters/panel_ignore_lid=1
/sys/module/i915/parameters/powersave=1
/sys/module/i915/parameters/prefault_disable=N
/sys/module/i915/parameters/preliminary_hw_support=1
/sys/module/i915/parameters/reset=Y
/sys/module/i915/parameters/semaphores=-1
/sys/module/i915/parameters/vbt_sdvo_panel_type=-1

以下是内容modinfo -p i915：

modeset:Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, 1=on, -1=force vga console preference [default]) (int)
panel_ignore_lid:Override lid status (0=autodetect, 1=autodetect disabled [default], -1=force lid closed, -2=force lid open) (int)
powersave:Enable powersavings, fbc, downclocking, etc. (default: true) (int)
semaphores:Use semaphores for inter-ring sync (default: -1 (use per-chip defaults)) (int)
enable_rc6:Enable power-saving render C-state 6. Different stages can be selected via bitmask values (0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. default: -1 (use per-chip default) (int)
enable_fbc:Enable frame buffer compression for power savings (default: -1 (use per-chip default)) (int)
lvds_downclock:Use panel (LVDS/eDP) downclocking for power savings (default: false) (int)
lvds_channel_mode:Specify LVDS channel mode (0=probe BIOS [default], 1=single-channel, 2=dual-channel) (int)
lvds_use_ssc:Use Spread Spectrum Clock with panels [LVDS/eDP] (default: auto from VBT) (int)
vbt_sdvo_panel_type:Override/Ignore selection of SDVO panel mode in the VBT (-2=ignore, -1=auto [default], index in VBT BIOS table) (int)
reset:Attempt GPU resets (default: true) (bool)
enable_hangcheck:Periodically check GPU activity for detecting hangs. WARNING: Disabling this can cause system wide hangs. (default: true) (bool)
enable_ppgtt:Override PPGTT usage. (-1=auto [default], 0=disabled, 1=aliasing, 2=full) (int)
enable_psr:Enable PSR (default: false) (int)
preliminary_hw_support:Enable preliminary hardware support. (int)
disable_power_well:Disable the power well when possible (default: true) (int)
enable_ips:Enable IPS (default: true) (int)
fastboot:Try to skip unnecessary mode sets at boot time (default: false) (bool)
prefault_disable:Disable page prefaulting for pread/pwrite/reloc (default:false). For developers only. (bool)
invert_brightness:Invert backlight brightness (-1 force normal, 0 machine defaults, 1 force inversion), please report PCI device ID, subsystem vendor and subsystem device ID to [email protected], if your machine needs it. It will then be included in an upcoming module version. (int)
disable_display:Disable display (default: false) (bool)
disable_vtd_wa:Disable all VT-d workarounds (default: false) (bool)
enable_cmd_parser:Enable command parsing (1=enabled [default], 0=disabled) (int)

答案1

我没有解决方案。我只是想指出，从 lspci 和 lshw 的输出来看，你似乎没有一个，但是二图形卡。

第二个未被任何驱动程序初始化：

*-显示：1 未认领

配置：延迟=0

编辑：寻找更多信息的地方是/var/log/Xorg.0.log以及其他日志文件，例如/var/log/syslog（或输出消息命令）来查找错误或警告，或任何可以帮助找到解决方案的内容

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