[Ltib] Re: LPC3250 board, X server fault: Invalid argument

[Dmitry Vinokurov]

Some news again.

Executing 'Xfbdev -nolisten tcp -ac -mouse mouse -keybd keyboard' 
results in:
===
Warning: mode not found, using default
error: Invalid argument

Fatal server error:
no screens found
===

If mode is set (as Daniel advised), 'Xfbdev -nolisten tcp -ac -mouse 
mouse -keybd keyboard -screen 320x240x18' (where 18 (6 for each R,G,B) 
is depth for my display, according to documentation) results in:
===
error: Invalid argument

Fatal server error:
no screens found
===

Settings resolution to 240x320 or something other lead to mode not found 
warning.

I've digged a little in the source and found function throwing an error 
-- it is fbdevScreenInitialize. Here is fragment of this function, 
containing error (as I think):
===
if (k < 0 || (t->horizontal != var.xres || t->vertical != var.yres))
   fbdevConvertMonitorTiming (t, &var);

var.activate = FB_ACTIVATE_NOW;
var.bits_per_pixel = screen->fb[0].depth;
var.nonstd = 0;
var.grayscale = 0;

k = ioctl (priv->fd, FBIOPUT_VSCREENINFO, &var);

if (k < 0)
{
   fprintf (stderr, "error: %s\n", strerror (errno));
   return FALSE;
}
===

I think error is here because before this code 'struct fb_var_screeninfo 
var' was initialized using 'k = ioctl (priv->fd, FBIOGET_VSCREENINFO, 
&var);' and all changes of 'var' structure is located exactly in this 
code. By the way, 'fbdevConvertMonitorTiming' executes because var.xres 
= 240 but t->horizontal = 320 and var.yres = 320 but t->vertical = 240

Adding 'fprintf(stderr, "%dx%dx%d\n", var.xres, var.yres, 
var.bits_per_pixel);' before 'k = ioctl (priv->fd, FBIOPUT_VSCREENINFO, 
&var);' give '320x240x18'.

Have anybody ideas about this error? I've completely stuck at this point.

--
Best Regards, 
Dmitry Vinokurov 
<address@hidden>



Dmitry Vinokurov wrote:
> Hello,
>
> I've compiled X server "tiny X (kdrive)" package and all packages in 
> "X11 libraries and packages section".
>
> When I try to execute 'startx' on RDK LPC3250, I get:
> /*
> _XSERVTransSocketOpenCOTSServer: Unable to open socket for inet6
> _XSERVTransOpen: transport open failed for inet6/nxp:0
> _XSERVTransMakeAllCOTSServerListeners: failed to open listener for inet6
> */
>
> Then I try to manually execute first line of startx script with 
> '-nolisten tcp' parameter:
> # Xfbdev -nolisten tcp -ac -mouse mouse -keybd keyboard
>
> And get following output:
> /*
> Warning: mode not found, using default
> error: Invalid argument
>
> Fatal server error:
> no screens found
> */
>
> Executing
> # Xfbdev -nolisten tcp
> gave same output.
>
> Can anybody explain, what exactly argument is invalid and what 'mode' 
> Xfbdev haven't found?
>
> Thanks in advance.