startup error while parsing xrandr output.

[Bubu]

I get the following exception when running any lwjgl application on this Lubuntu 14.04.02 Notebook.:

Exception in thread "LWJGL Application" java.lang.ExceptionInInitializerError
    at com.badlogic.gdx.backends.lwjgl.LwjglGraphics.setVSync(LwjglGraphics.java:446)
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:118)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
    at org.lwjgl.opengl.LinuxDisplay.getAvailableDisplayModes(LinuxDisplay.java:954)
    at org.lwjgl.opengl.LinuxDisplay.init(LinuxDisplay.java:738)
    at org.lwjgl.opengl.Display.<clinit>(Display.java:138)

I traced the error to the xrandr parsing function but could not yet exactly pinpoint it.

Below is the output of xrandr. The offending lines are definitely the bottom ones with LVDS-1-1 connected. The laptop has 2 graphics card, I think this is probably the root cause:

$> lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 4330/4350/4550]

$> xrandr -q
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 32767 x 32767
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
   1366x768       60.0*+
   1360x768       59.8     60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
TV1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
VGA-1-1 disconnected
LVDS-1-1 connected
   1366x768       60.0 +
   1280x720       59.9  
   1152x768       59.8  
   1024x768       59.9  
   800x600        59.9  
   848x480        59.7  
   720x480        59.7  
   640x480        59.4  
HDMI-1-0 disconnected
  1366x768 (0x45)   75.1MHz
        h: width  1366 start 1414 end 1446 total 1564 skew    0 clock   48.0KHz
        v: height  768 start  771 end  776 total  800           clock   60.0Hz

[tfg13]

Do you know which version of LWJGL is producing this?
Also, please gather some more info by launching your application with

-Dorg.lwjgl.util.Debug=true

as JVM argument and post all output that begins with [LWJGL]

[Bubu]

The version is LWJGL 2.9.2.
I will add the other info later, I'm currently not on that PC.

[tfg13]

Thanks.
Also the xrandr output looks a bit strange. You are absolutely right,

LVDS-1-1 connected

breaks the parsing. I tried this with the latest LWJGL version, which results in a different error, but still does not work edit: changed my mind, seems to be the same problem. How exactly did you run xrandr to get this output? Please check if

xrandr -q

produces the same. If it does, we probaly need to patch LWJGL to support this. Besides,

xrandr -v

would also be nice to know.

[Bubu]

The above output is xrandr -q (same as just xrandr).

$> xrandr -v
xrandr program version       1.4.1
Server reports RandR version 1.4

[tfg13]

ok. I will create a patch for this as soon as I find some time, may take a couple of days.
Just out of curiosity, can you please post the output of

xrandr --verbose

I still think having a display with unknown resolution is a bit odd.
I should probably also fix the parsing for the HDMI lines, they all look quite odd and will break the parsing sooner or later.

[Bubu]

$> xrandr --verbose
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 32767 x 32767
LVDS1 connected 1366x768+0+0 (0x45) normal (normal left inverted right x axis y axis) 310mm x 174mm
    Identifier: 0x6f
    Timestamp:  36654
    Subpixel:   horizontal rgb
    Gamma:      1.0:1.0:1.0
    Brightness: 1.0
    Clones:   
    CRTC:       0
    CRTCs:      0 1
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter:
    EDID:
        00ffffffffffff0030e4024300000000
        00130103801f11780a8845955a568d28
        23505400000001010101010101010101
        010101010101561d56c6500020303020
        350036ae100000190000000000000000
        00000000000000000000000000fe004c
        4720446973706c61790a2020000000fc
        004c503134305748322d544c423100f6
    BACKLIGHT: 5
        range: (0, 9)
    Backlight: 5
        range: (0, 9)
    scaling mode: Full aspect
        supported: None, Full, Center, Full aspect
  1366x768 (0x45)   75.1MHz -HSync -VSync *current +preferred
        h: width  1366 start 1414 end 1446 total 1564 skew    0 clock   48.0KHz
        v: height  768 start  771 end  776 total  800           clock   60.0Hz
  1360x768 (0xbe)   84.8MHz -HSync +VSync
        h: width  1360 start 1432 end 1568 total 1776 skew    0 clock   47.7KHz
        v: height  768 start  771 end  781 total  798           clock   59.8Hz
  1360x768 (0xbf)   72.0MHz +HSync -VSync
        h: width  1360 start 1408 end 1440 total 1520 skew    0 clock   47.4KHz
        v: height  768 start  771 end  781 total  790           clock   60.0Hz
  1024x768 (0xc0)   65.0MHz -HSync -VSync
        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock   48.4KHz
        v: height  768 start  771 end  777 total  806           clock   60.0Hz
  800x600 (0xc1)   40.0MHz +HSync +VSync
        h: width   800 start  840 end  968 total 1056 skew    0 clock   37.9KHz
        v: height  600 start  601 end  605 total  628           clock   60.3Hz
  800x600 (0xc2)   36.0MHz +HSync +VSync
        h: width   800 start  824 end  896 total 1024 skew    0 clock   35.2KHz
        v: height  600 start  601 end  603 total  625           clock   56.2Hz
  640x480 (0xc3)   25.2MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock   31.5KHz
        v: height  480 start  490 end  492 total  525           clock   59.9Hz
VGA1 disconnected (normal left inverted right x axis y axis)
    Identifier: 0x70
    Timestamp:  36654
    Subpixel:   unknown
    Clones:   
    CRTCs:      0 1
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter:
DP1 disconnected (normal left inverted right x axis y axis)
    Identifier: 0x71
    Timestamp:  36654
    Subpixel:   unknown
    Clones:   
    CRTCs:      0 1
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter:
    Broadcast RGB: Automatic
        supported: Automatic, Full, Limited 16:235
    audio: auto
        supported: force-dvi, off, auto, on
TV1 disconnected (normal left inverted right x axis y axis)
    Identifier: 0x72
    Timestamp:  36654
    Subpixel:   unknown
    Clones:   
    CRTCs:      0 1
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter:
    bottom margin: 37
        range: (0, 100)
    right margin: 46
        range: (0, 100)
    top margin: 36
        range: (0, 100)
    left margin: 54
        range: (0, 100)
    mode: NTSC-M
        supported: NTSC-M, NTSC-443, NTSC-J, PAL-M, PAL-N, PAL, 480p, 576p, 720p@60Hz, 720p@50Hz, 1080i@50Hz, 1080i@60Hz
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
    Identifier: 0x73
    Timestamp:  36654
    Subpixel:   no subpixels
    Clones:   
    CRTCs:      2
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter:
VGA-1-1 disconnected (normal)
    Identifier: 0x41
    Timestamp:  36654
    Subpixel:   no subpixels
    Clones:   
    CRTCs:      3 4
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter:
    load detection: 1
        range: (0, 1)
LVDS-1-1 connected (normal)
    Identifier: 0x42
    Timestamp:  36654
    Subpixel:   horizontal rgb
    Clones:   
    CRTCs:      3 4
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter:
    scaling mode: Full
        supported: None, Full, Center, Full aspect
  1366x768 (0x45)   75.1MHz -HSync -VSync +preferred
        h: width  1366 start 1414 end 1446 total 1564 skew    0 clock   48.0KHz
        v: height  768 start  771 end  776 total  800           clock   60.0Hz
  1280x720 (0x46)   74.5MHz -HSync +VSync
        h: width  1280 start 1344 end 1472 total 1664 skew    0 clock   44.8KHz
        v: height  720 start  723 end  728 total  748           clock   59.9Hz
  1152x768 (0x47)   71.8MHz -HSync +VSync
        h: width  1152 start 1216 end 1328 total 1504 skew    0 clock   47.7KHz
        v: height  768 start  771 end  781 total  798           clock   59.8Hz
  1024x768 (0x48)   63.5MHz -HSync +VSync
        h: width  1024 start 1072 end 1176 total 1328 skew    0 clock   47.8KHz
        v: height  768 start  771 end  775 total  798           clock   59.9Hz
  800x600 (0x49)   38.2MHz -HSync +VSync
        h: width   800 start  832 end  912 total 1024 skew    0 clock   37.4KHz
        v: height  600 start  603 end  607 total  624           clock   59.9Hz
  848x480 (0x4a)   31.5MHz -HSync +VSync
        h: width   848 start  872 end  952 total 1056 skew    0 clock   29.8KHz
        v: height  480 start  483 end  493 total  500           clock   59.7Hz
  720x480 (0x4b)   26.8MHz -HSync +VSync
        h: width   720 start  744 end  808 total  896 skew    0 clock   29.9KHz
        v: height  480 start  483 end  493 total  500           clock   59.7Hz
  640x480 (0x4c)   23.8MHz -HSync +VSync
        h: width   640 start  664 end  720 total  800 skew    0 clock   29.7KHz
        v: height  480 start  483 end  487 total  500           clock   59.4Hz
HDMI-1-0 disconnected (normal)
    Identifier: 0x43
    Timestamp:  36654
    Subpixel:   horizontal rgb
    Clones:   
    CRTCs:      3 4
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter:
    dither: off
        supported: off, on
    audio: auto
        supported: off, on, auto
    underscan vborder: 0
        range: (0, 128)
    underscan hborder: 0
        range: (0, 128)
    underscan: off
        supported: off, on, auto
    coherent: 1
        range: (0, 1)
  1366x768 (0x45)   75.1MHz
        h: width  1366 start 1414 end 1446 total 1564 skew    0 clock   48.0KHz
        v: height  768 start  771 end  776 total  800           clock   60.0Hz

[Bubu]

Adding the output of:

-Dorg.lwjgl.util.Debug=true

[LWJGL] Xrandr extension version 1.4
[LWJGL] Using Xrandr for display mode switching
[LWJGL] Exception in XRandR.populate(): 2

[tfg13]

I just crafted a possible fix: tfg13/lwjgl@0b83683

Before we commit anything, please try this fix by manually replacing lwjgl.jar with the one from this test release: https://github.com/tfg13/lwjgl/releases/tag/test_lwjgl%23112

[Bubu]

I will test it and let you know. But it will be a few days until I have the opportunity.

[Bubu]

Works perfectly! Thank you for the fix. When will it be merged/released?

[grauerkoala]

I've run into a similar problem that I'm adding here, because I think it's related closely enough. I too am using a notebook with two graphics cards, but I usually connect an external monitor to it and then disable the notebooks's monitor. When I do this, I get this error:

Exception in thread "LWJGL Application" java.lang.ExceptionInInitializerError
    at com.badlogic.gdx.backends.lwjgl.LwjglGraphics.setVSync(LwjglGraphics.java:446)
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:118)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
    at org.lwjgl.opengl.XRandR.findPrimary(XRandR.java:326)
    at org.lwjgl.opengl.XRandR.ScreentoDisplayMode(XRandR.java:315)
    at org.lwjgl.opengl.LinuxDisplay$3.run(LinuxDisplay.java:746)
    at org.lwjgl.opengl.LinuxDisplay$3.run(LinuxDisplay.java:743)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.lwjgl.opengl.LinuxDisplay.init(LinuxDisplay.java:743)
    at org.lwjgl.opengl.Display.<clinit>(Display.java:138)
    ... 2 more
AL lib: (EE) alc_cleanup: 1 device not closed

When I disable the external monitor and instead enable the notebook's monitor, it works out just fine.

This is the output for xrandr -q when I'm using the external monitor:

Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
LVDS1 connected (normal left inverted right x axis y axis)
   1600x900      60.00 +
   1440x900      59.89  
   1360x768      59.80    59.96  
   1152x864      60.00  
   1024x768      60.00  
   800x600       60.32    56.25  
   640x480       59.94  
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   VIRTUAL1.735-1920x1080  60.00* 
   VIRTUAL1.736-1680x1050  59.95  
   1440x900      59.89  
   VIRTUAL1.738-1280x1024  75.02  
   VIRTUAL1.739-1280x1024  60.02  
   VIRTUAL1.740-1280x960  60.00  
   VIRTUAL1.741-1280x720  60.00  
   VIRTUAL1.742-1024x768  75.03  
   VIRTUAL1.743-1024x768  70.07  
   1024x768      60.00  
   VIRTUAL1.745-800x600  75.00  
   VIRTUAL1.746-800x600  72.19  
   800x600       60.32    56.25  
   VIRTUAL1.749-640x480  75.00  
   VIRTUAL1.750-640x480  72.81  
   640x480       59.94  
VIRTUAL2 disconnected (normal left inverted right x axis y axis)
VIRTUAL3 disconnected (normal left inverted right x axis y axis)
VIRTUAL4 disconnected (normal left inverted right x axis y axis)
VIRTUAL5 disconnected (normal left inverted right x axis y axis)
VIRTUAL6 disconnected (normal left inverted right x axis y axis)
VIRTUAL7 disconnected (normal left inverted right x axis y axis)
VIRTUAL8 disconnected (normal left inverted right x axis y axis)
VIRTUAL9 disconnected (normal left inverted right x axis y axis)

And here's what I get when I'm using the notebook's monitor:

Screen 0: minimum 8 x 8, current 1600 x 900, maximum 32767 x 32767
LVDS1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
   1600x900      60.00*+
   1440x900      59.89  
   1360x768      59.80    59.96  
   1152x864      60.00  
   1024x768      60.00  
   800x600       60.32    56.25  
   640x480       59.94  
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 connected (normal left inverted right x axis y axis)
   VIRTUAL1.735-1920x1080  60.00  
   VIRTUAL1.736-1680x1050  59.95  
   1440x900      59.89  
   VIRTUAL1.738-1280x1024  75.02  
   VIRTUAL1.739-1280x1024  60.02  
   VIRTUAL1.740-1280x960  60.00  
   VIRTUAL1.741-1280x720  60.00  
   VIRTUAL1.742-1024x768  75.03  
   VIRTUAL1.743-1024x768  70.07  
   1024x768      60.00  
   VIRTUAL1.745-800x600  75.00  
   VIRTUAL1.746-800x600  72.19  
   800x600       60.32    56.25  
   VIRTUAL1.749-640x480  75.00  
   VIRTUAL1.750-640x480  72.81  
   640x480       59.94  
VIRTUAL2 disconnected (normal left inverted right x axis y axis)
VIRTUAL3 disconnected (normal left inverted right x axis y axis)
VIRTUAL4 disconnected (normal left inverted right x axis y axis)
VIRTUAL5 disconnected (normal left inverted right x axis y axis)
VIRTUAL6 disconnected (normal left inverted right x axis y axis)
VIRTUAL7 disconnected (normal left inverted right x axis y axis)
VIRTUAL8 disconnected (normal left inverted right x axis y axis)
VIRTUAL9 disconnected (normal left inverted right x axis y axis)

So it's basically just the difference of the indicated mode in use.
I'd be glad if someone with more insight into this library could have a look at this -- I only came over here from another project because I noticed this behaviour. :)

[dbazim]

Looking at the org.lwjgl.opengl.XRandR code I see that the following resolution string will not be parsed correctly.
1920x1080i 60.1* 50.0 60.0
That is because the pattern SCREEN_MODELINE_PATTERN= "^(\d+)x(\d+)$"
Such resolution string will cause
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
at org.lwjgl.opengl.XRandR.findPrimary(XRandR.java:326)

Please provide fix for that cases.