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Full Discussion: Resolution Won't Change on Headless Linux Box?
Top Forums UNIX for Beginners Questions & Answers Resolution Won't Change on Headless Linux Box? Post 302996482 by mrm5102 on Thursday 27th of April 2017 03:46:04 PM
Old 04-27-2017
Hey Jim, thanks for the reply.

I would assume it has a graphics card if it has an HDMI port, right? I've been trying to figure out what the Graphics card is, but the lspci command produces no output at all. I did get output from hwinfo, but the only thing that seems relevant is the driver "mxc_hdmi".

Other then that I'm not really sure.

I found this info below, in the hwinfo output... Sorry, if its not related to what you're asking.
Code:
  P: /devices/virtual/mxc_hdmi/mxc_hdmi
  N: mxc_hdmi
  E: DEVNAME=/dev/mxc_hdmi
  E: DEVPATH=/devices/virtual/mxc_hdmi/mxc_hdmi
  E: MAJOR=247
  E: MINOR=0
  E: SUBSYSTEM=mxc_hdmi
  
  P: /devices/virtual/mxc_hdmi_cec/mxc_hdmi_cec
  N: mxc_hdmi_cec
  E: DEVNAME=/dev/mxc_hdmi_cec
  E: DEVPATH=/devices/virtual/mxc_hdmi_cec/mxc_hdmi_cec
  E: MAJOR=243
  E: MINOR=0
  E: SUBSYSTEM=mxc_hdmi_cec
  
  P: /devices/virtual/mxc_ipu/mxc_ipu
  N: mxc_ipu
  E: DEVNAME=/dev/mxc_ipu
  E: DEVPATH=/devices/virtual/mxc_ipu/mxc_ipu
  E: MAJOR=249
  E: MINOR=0
  E: SUBSYSTEM=mxc_ipu
  
  P: /devices/virtual/mxc_vpu/mxc_vpu
  N: mxc_vpu
  E: DEVNAME=/dev/mxc_vpu
  E: DEVPATH=/devices/virtual/mxc_vpu/mxc_vpu
  E: MAJOR=244
  E: MINOR=0
  E: SUBSYSTEM=mxc_vpu

  P: /devices/soc0/soc.1/120000.hdmi_core
  E: DEVPATH=/devices/soc0/soc.1/120000.hdmi_core
  E: DRIVER=mxc_hdmi_core
  E: MODALIAS=of:Nhdmi_coreT<NULL>Cfsl,imx6dl-hdmi-core
  E: OF_COMPATIBLE_0=fsl,imx6dl-hdmi-core
  E: OF_COMPATIBLE_N=1
  E: OF_FULLNAME=/soc/hdmi_core@00120000
  E: OF_NAME=hdmi_core
  E: SUBSYSTEM=platform

  P: /devices/soc0/soc.1/130000.gpu
  E: DEVPATH=/devices/soc0/soc.1/130000.gpu
  E: DRIVER=galcore
  E: MODALIAS=of:NgpuT<NULL>Cfsl,imx6dl-gpuCfsl,imx6q-gpu
  E: OF_COMPATIBLE_0=fsl,imx6dl-gpu
  E: OF_COMPATIBLE_1=fsl,imx6q-gpu
  E: OF_COMPATIBLE_N=2
  E: OF_FULLNAME=/soc/gpu@00130000
  E: OF_NAME=gpu
  E: SUBSYSTEM=platform



            galcore: /devices/soc0/soc.1/130000.gpu
         mxc_vpu: /devices/soc0/soc.1/2000000.aips-bus/2040000.vpu
        mxc_asrc: /devices/soc0/soc.1/2000000.aips-bus/2000000.spba-bus/2034000.asrc
        mxc_hdmi: /devices/soc0/soc.1/20e0000.hdmi_video
        mxc_vdoa: /devices/soc0/soc.1/2100000.aips-bus/21e4000.vdoa
         mxs-dma: /devices/soc0/soc.1/110000.dma-apbh

  platform device: name = 130000.gpu
    path = /devices/soc0/soc.1/130000.gpu
    type = "of:NgpuT<NULL>Cfsl,imx6dl-gpuCfsl,imx6q-gpu"

If you have any commands you would like me to run to get you more info, just let me know.

Thanks again for the reply, much appreciated.

-Matt

---------- Post updated at 06:07 PM ---------- Previous update was at 04:10 PM ----------

After just Googling around a bit for the "imx6dl GPU", which you can see in the hwinfo output I posted. It seems like it's part of the Vivante Graphics Card... Does that sound correct?

And after learning Vivante might be the Graphics card, I checked the hwinfo output again and found:
Code:
  P: /devices/platform/Vivante GCCore/drm/card0
  N: dri/card0
  E: DEVNAME=/dev/dri/card0
  E: DEVPATH=/devices/platform/Vivante GCCore/drm/card0
  E: DEVTYPE=drm_minor
  E: ID_FOR_SEAT=drm-platform-Vivante_GCCore
  E: ID_PATH=platform-Vivante GCCore
  E: ID_PATH_TAG=platform-Vivante_GCCore
  E: MAJOR=226
  E: MINOR=0
  E: SUBSYSTEM=drm
  E: TAGS=:seat:uaccess:
  E: USEC_INITIALIZED=135504

I've been racking my brain trying to find the command I used yesterday, but I cannot seem to find what it was. But I remember running a command yesterday and in the output was "GC880", which in Googling it, its a Vivante imx6 GPU...

-Matt

---------- Post updated at 07:13 PM ---------- Previous update was at 06:07 PM ----------

***UPDATE***

I think I might have figured out a solution..! I'll post back tomorrow with what I did and hopefully someone can tell me if it would/could cause any issues going forward...

Thanks,
Matt

---------- Post updated 04-27-17 at 03:46 PM ---------- Previous update was 04-26-17 at 07:13 PM ----------

So in looking at the Xorg.0.log file I noticed X was looking for display drivers in the directory /usr/lib/xorg/modules/drivers/.

Code:
CuBox-PC:~ # cat /var/log/Xorg.0.log | grep -i ModulePath
# cat /var/log/Xorg.0.log | grep -i ModulePath
[ 87517.193] (==) ModulePath set to "/usr/lib/xorg/modules/updates,/usr/lib/xorg/modules"

I decided to try the driver located in this directory called fbdev_drv.so in my xorg.conf file. Stopped and Started the Xserver again and this time it now allows me to change the Screen size to almost whatever I want...

Here's my xorg.conf file containing a bunch of Modelines for different resolutions.
*Modelines from the "cvt" command...
Code:
Section "Monitor"
    Identifier    "Monitor0"
    VertRefresh    50.0 - 70.0
    HorizSync    31.0 - 69.0
    # 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
    Modeline "1920x1080"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
    # 1680x1050 59.95 Hz (CVT 1.76MA) hsync: 65.29 kHz; pclk: 146.25 MHz
    Modeline "1680x1050"  146.25  1680 1784 1960 2240  1050 1053 1059 1089 -hsync +vsync
    # 1600x1200 59.87 Hz (CVT 1.92M3) hsync: 74.54 kHz; pclk: 161.00 MHz
    #Modeline "1600x1200"  161.00  1600 1712 1880 2160  1200 1203 1207 1245 -hsync +vsync
    # 1600x900 59.95 Hz (CVT 1.44M9) hsync: 55.99 kHz; pclk: 118.25 MHz
    Modeline "1600x900"  118.25  1600 1696 1856 2112  900 903 908 934 -hsync +vsync
    # 1440x900 59.89 Hz (CVT 1.30MA) hsync: 55.93 kHz; pclk: 106.50 MHz
    Modeline "1440x900"  106.50  1440 1528 1672 1904  900 903 909 934 -hsync +vsync
    # 1400x1050 59.98 Hz (CVT 1.47M3) hsync: 65.32 kHz; pclk: 121.75 MHz
    Modeline "1400x1050"  121.75  1400 1488 1632 1864  1050 1053 1057 1089 -hsync +vsync
    # 1280x1024 59.89 Hz (CVT 1.31M4) hsync: 63.67 kHz; pclk: 109.00 MHz
    Modeline "1280x1024"  109.00  1280 1368 1496 1712  1024 1027 1034 1063 -hsync +vsync
    # 1280x960 59.94 Hz (CVT 1.23M3) hsync: 59.70 kHz; pclk: 101.25 MHz
    Modeline "1280x960"  101.25  1280 1360 1488 1696  960 963 967 996 -hsync +vsync
    # 1280x720 59.86 Hz (CVT 0.92M9) hsync: 44.77 kHz; pclk: 74.50 MHz
    Modeline "1280x720"   74.50  1280 1344 1472 1664  720 723 728 748 -hsync +vsync
    # 1024x768 59.92 Hz (CVT 0.79M3) hsync: 47.82 kHz; pclk: 63.50 MHz
    Modeline "1024x768"   63.50  1024 1072 1176 1328  768 771 775 798 -hsync +vsync
    # 800x600 59.86 Hz (CVT 0.48M3) hsync: 37.35 kHz; pclk: 38.25 MHz
    Modeline "800x600"   38.25  800 832 912 1024  600 603 607 624 -hsync +vsync
    # 640x480 59.38 Hz (CVT 0.31M3) hsync: 29.69 kHz; pclk: 23.75 MHz
    Modeline "640x480"   23.75  640 664 720 800  480 483 487 500 -hsync +vsync
EndSection

Section "Device"
    Identifier    "Card0"
    Driver        "fbdev"
EndSection

Section "Screen"
    DefaultDepth    24
    Identifier    "Screen0"
    Device        "Card0"
    Monitor        "Monitor0"
    SubSection "Display"
        Depth    24
        Modes    "1920x1080" "1680x1050" "1600x1200" "1600x900" "1440x900" "1400x1050" "1280x1024" "1280x960" "1280x720" "1024x768" "800x600" "640x480"
    EndSubSection
EndSection

 

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