Hi,

I'm trying to print a lazreport on a Raspberry Pi2. It's not working, I get :
Bus Error or misaligned data access
Press OK to ignore ...

Pressing OK does nothing.

Any suggestions to solve this ?

I also tried the example from
http://wiki.lazarus.freepascal.org/Using_the_printer. On my x86 linux-machine this works, on the RPi, nothing happens.

Koenraad.

El 29/10/15 a las 12:24, Koenraad Lelong escribi?:

Hi Koenraad, can you print using the RPi from other applications?.

Regards,
Leonardo.

Op 30-10-15 om 09:51 schreef Leonardo M. Ram?:

Hi Leonardo,

Yes I can print. The cups-testpage certainly works. I also tried with libreoffice, works fine.
But leafpad has a problem. It generates a job in cups, but nothing comes out of the printer.

Koenraad

I had a Lazarus printing problem because of unwritable ~/tmp .

Are the /tmp and ~/tmp directories writable by your user account and application?

Op 01-11-15 om 18:08 schreef Anthony Tekatch:

I managed to get Lazarus running on my Odroid-C1 so I can debug. When running the application, and trying to print it gives the error in LR_Prntr :

  // printer sizes
  with PaperSize.PaperRect do begin
   PPgw := PhysicalRect.Right-PhysicalRect.Left;
   Ppgh := PhysicalRect.Bottom-PhysicalRect.Top;
   POFx := WorkRect.Left;
   POFy := WorkRect.Top;
   PPw  := WorkRect.Right-WorkRect.Left; // this is the same as PageWidth
   PPh  := WorkRect.Bottom-WorkRect.Top; // this is the same as PageHeight
  end;
  // screen sizes
  Pgw := round(PPgw * kx);   <----- error, line 1042
  Pgh := round(PPgh * ky);
  Ofx := round(POfx * kx);
  Ofy := round(POfy * ky);
  Pw  := round(PPw  * kx);
  Ph  := round(PPh  * ky);

Op 05-11-15 om 11:30 schreef Koenraad Lelong:

I tried on a raspberry pi, with fpc 3.0.0 and lazarus 1.6rc1. It gives the same error. I investigated further and it's the product that gives the error.

Any idea what's happening ?

Koenraad.

I did some further testing.

I modified the code somewhat :
       tmp1:=PPgw;
       tmp2:=kx;
       tmp1:=tmp1 * tmp2;
       Pgw:=round(tmp1);
//      Pgw := round(PPgw * kx);

tmp1 and tmp2 are Double. Running in gdb and backtracing at the crash gives this :

Program received signal SIGBUS, Bus error.
0x004b45fc in TFRPRINTER__FILLPRNINFO (P=..., this=<error reading variable>) at lr_prntr.pas:1044
1044 tmp1:=PPgw;
(gdb) bt
#0 0x004b45fc in TFRPRINTER__FILLPRNINFO (P=..., this=<error reading variable>) at lr_prntr.pas:1044
#1 0x003bc198 in TFRREPORT__DOPRINTREPORT (PAGENUMBERS=0x744cff8c '1-1', COPIES=1, this=<error reading variable>)
at lr_class.pas:11429
#2 0x003bbe20 in TFRREPORT__PRINTBEFOREMODAL (SENDER=0x75f0a450, this=<error reading variable>) at lr_class.pas:11237 #3 0x004c4548 in TFRPROGRESSFORM__DOBEFOREMODAL (DATA=0, this=<error reading variable>) at lr_progr.pas:88
#4 0x0006b71c in TAPPLICATION__PROCESSASYNCCALLQUEUE (this=<error reading variable>)
at ./include/application.inc:1067
#5 0x000699c0 in TAPPLICATION__IDLE (WAIT=true, this=<error reading variable>) at ./include/application.inc:389
#6 0x00063930 in TCUSTOMFORM__SHOWMODAL (this=<error reading variable>) at ./include/customform.inc:2916
#7 0x004c4484 in TFRPROGRESSFORM__SHOW_MODAL (DOC=0x754ab400, this=<error reading variable>) at lr_progr.pas:70
#8 0x003bbfbc in TFRREPORT__PRINTPREPAREDREPORT (PAGENUMBERS=0x744cff8c '1-1', COPIES=1,
this=<error reading variable>) at lr_class.pas:11265 #9 0x000739d8 in BTNPRINTSETUPCLICK (this=0x756429b0, SENDER=0x75f04870) at modmain.pas:229
#10 0x00224e5c in TCONTROL__CLICK (this=<error reading variable>) at ./include/control.inc:2734
#11 0x00251028 in TBUTTONCONTROL__CLICK (this=<error reading variable>) at ./include/buttoncontrol.inc:54
#12 0x00251928 in TCUSTOMBUTTON__CLICK (this=<error reading variable>) at ./include/buttons.inc:169
#13 0x00250ef4 in TBUTTONCONTROL__WMDEFAULTCLICKED (MESSAGE=..., this=<error reading variable>)
at ./include/buttoncontrol.inc:20
#14 0x00041360 in SYSTEM$_$TOBJECT_$__$$_DISPATCH$formal () #15 0x00223bc8 in TCONTROL__WNDPROC (THEMESSAGE=..., this=<error reading variable>) at ./include/control.inc:2122
#16 0x00215b1c in TWINCONTROL__WNDPROC (MESSAGE=..., this=<error reading variable>) at ./include/wincontrol.inc:5383
#17 0x002f7a14 in DELIVERMESSAGE (TARGET=0x75f04870, AMESSAGE=<error reading variable: Attempt to dereference a generic pointer.>) at lclmessageglue.pas:112
#18 0x00309f78 in GTK2WSBUTTON_CLICKED (AWIDGET=0x985708, AINFO=0x75c5c7e0) at gtk2wsstdctrls.pp:2428
#19 0x76972afc in ?? () from
/usr/lib/arm-linux-gnueabihf/libgobject-2.0.so.0
Backtrace stopped: previous frame identical to this frame (corrupt stack?) (gdb)

Op 29-10-15 om 16:24 schreef Koenraad Lelong:

Hi,

Hopefully someone with more knowledge than me will look into this : bugtracker issue# 29512

B.T.W. the program from the wiki-page mentioned above does work on the PI.

Koenraad.

Not sure if you resolved the missed align data error (im coming to the party late), today i have had the same problem, now below is the crude mod i did to get it working for me, not sure if it will help your problem but worth a try.

LR_Prntr unit. around line 1042

// screen sizes
      Pgw :=
round((PaperSize.PaperRect.PhysicalRect.Right-PaperSize.PaperRect.PhysicalRect.Left)
* kx);
      //Pgw := round(PPgw * kx);
      Pgh :=
round((PaperSize.PaperRect.PhysicalRect.Bottom-PaperSize.PaperRect.PhysicalRect.Top)
* ky);
      //Pgh := round(PPgh * ky);
      Ofx := round(PaperSize.PaperRect.WorkRect.Left * kx);
      //Ofx := round(POfx * kx);
      Ofy := round(PaperSize.PaperRect.WorkRect.Top * ky);
      //Ofy := round(POfy * ky);
      Pw  :=
round((PaperSize.PaperRect.WorkRect.Right-PaperSize.PaperRect.WorkRect.Left)
* kx);
      //Pw  := round(PPw  * kx);
      Ph  :=
round((PaperSize.PaperRect.WorkRect.Bottom-PaperSize.PaperRect.WorkRect.Top)
* ky);
      //Ph  := round(PPh  * ky);

kind regards

Tony

Op 05-04-16 om 21:00 schreef ahiggins:

Hi Tony,

If you had looked at the bug-tracker, you would have found a solution ;-) Maybe I should have posted it here also.
I used an intermediate variable, because a type-cast crashed the application :
// Pgw := round(PPgw * kx); Does not work on Pi

       tmp1:=PPgw;
       Pgw:=round(tmp1 * kx);

etc. where tmp1 is a longint.
I find my solution also a hack, but it works so I'm satisfied.

Koenraad.