Laptop LVDS (built-in) monitor not recognized under 14.04

14.04 graphics multiple-monitors intel-graphics dkms

6,577

I have no solution for you. I just wanted to point out that from the output of lspci and lshw, you seem to have not one but two graphic cards.

the second not being initialised by any driver:

*-display:1 UNCLAIMED

configuration: latency=0

Edit: and a place to look for more information is /var/log/Xorg.0.log, and the other log files like /var/log/syslog (or the ouput of dmesg command) to look for errors or warning or whatever that could help find a solution

6,577

f1r3br4nd

Updated on September 18, 2022

Comments

f1r3br4nd over 1 year

I've been running Ubuntu 10.04 on my Dell Vostro 1220 with and without various external VGA devices since 2010 with no problems. I finally tried doing a fresh install of 14.04, and my laptop's built-in monitor would not work unless I added the nomodeset option to /etc/default/grub:

GRUB_CMDLINE_LINUX="nomodeset"

This allowed me to boot, but not change the resolution, nor recognize the external VGA monitor. After googling the problem, I learned that the appropriate driver for my Mobile Intel® Graphics Media Accelerator X4500MHD seems to be i915 DRM. I also learned that nomodeset was likely preventing the display modes on my LVDS screen from being changed and the external VGA from being recognized because it was disabling KMS. So, I installed Intel Linux Graphics Installer 1.0.7, ran it, and after some trial and error changed the boot options in /etc/default/grub to say...

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

Now my system recognizes the external VGA just fine, but the built-in LVDS screen is black. Even if I boot up without the VGA plugged in.

Here is the output from 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)

If I try to add a mode to LVDS1, here is what happens...

$ 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

I really have no idea what I'm doing at this point. Can someone please tell me how I can get Ubuntu 14.04 or some other supported version to recognize both the VGA and LVDS on a laptop with a X4500MHD graphics card, or further steps in troubleshooting this problem, or reading material to understand what it is I'm not getting?

Or, is there a recommended procedure for downgrading from the video drivers and/or kernel in 14.04 to earlier ones that don't break support for my video card?

Thank you.

I don't want to be one of those people with vague questions. Below is all the output I could think of that might be relevant to the problem. I'll be happy to dump anything else anybody thinks would be useful.

Here is what I'm running:

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 claims to be connected.

~$ 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

There don't seem to be any errors being reported by the GPU:

~# 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

Video-related output from 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

Output from 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

Here are the parameters on the i915 video module that as far as I can tell is the module for my chipset...

~# 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

Here is what modinfo -p i915 says:

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)

f1r3br4nd over 9 years

Actually, I just ran lshw while booted into Lucid 10.04 (2.6.35-32-generic kernel) where LVDS1 and VGA1 both work normally and got almost exactly the same output as before (including *-display:1 UNCLAIMED and configuration:latency=0). So I'm not sure anymore that those are indicative of problems. The only difference from the 3.13.0-39-generic kernel (where LVDS1 isn't working and won't accept mode settings from xrandr) is that vga_controller is missing from the capabilities: line of the lshw -c video output when booted into the 2.6.35-32-generic kernel