[Samba] Printing from WinCE5.0

[vladas]

I'm trying to print through network, from WinCE5.0 machine to Debian machine with Samba printer share. The problem is, tht only first 1024 bytes of print data are spooled and printed.
Printing to Samba share from WinXP or Win10 or Win98 works fine. Also printing from WinCE to printer shared on WinXP works fine.
I've tried various smb.conf parameters to no avail. I've viewed Samba logs, but see nothing suspicious. From Wireshark captures it seems that WinCE machine sends print job in multiple "Write Print File" SMB protocol request/response pairs, each request carrying 1024 bytes of data buffer, while Samba doesn't respond after getting first Write request. Tried different smb.conf options conserning printing, authentication and LANMAN protocol, but nothing changes.
I will try to test some earlier Samba versions. But in the meantime, maybe someone has some ideas?

Samba v4.9.5-Debian on Debian v10.2.

Summary of few lines from both communications:

WinCE(.110) -> Samba printer(.100):
____Time________Source__________Destination_________Length____________________________________
3   0.000576770 192.168.56.110  192.168.56.100  SMB 114  Open Print File Request
4   0.004836002 192.168.56.100  192.168.56.110  SMB 95   Open Print File Response, FID: 0xe66f
5   0.120431958 192.168.56.110  192.168.56.100  SMB 1122 Write Print File Request, FID: 0xe66f < Samba server doesn't respond
6   14.53644067 192.168.56.110  192.168.56.100  SMB 121  IOCTL Request                         < WinCE client time out

WinCE(.110) -> WinXP printer(.50):
3   5.999890000 192.168.56.110  192.168.56.50   SMB 114  Open Print File Request
4   6.016150000 192.168.56.50   192.168.56.110  SMB 95   Open Print File Response, FID: 0x4002
5   6.130776000 192.168.56.110  192.168.56.50   SMB 1122 Write Print File Request, FID: 0x4002
6   6.134142000 192.168.56.50   192.168.56.110  SMB 93   Write Print File Response
7   6.185446000 192.168.56.110  192.168.56.50   SMB 1122 Write Print File Request, FID: 0x4002
8   6.185543000 192.168.56.50   192.168.56.110  SMB 93   Write Print File Response
9   ..................................

My current smb.conf file:

[global]
   workgroup = WORK
   security = user
   lanman auth = yes #no effect
   ntlm auth  = yes #no effect
   server string =
   ea support = no #no effect
   printing = sysv #no effect
   server role = standalone server
   obey pam restrictions = yes
   unix password sync = yes
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
   pam password change = yes
   map to guest = bad user
[homes]
   comment = Home Directories
   browseable = no
   read only = yes
   create mask = 0700
   directory mask = 0700
   valid users = %S
[printers]
   comment = All Printers
   browseable = no
   path = /var/spool/samba
   printable = no
   guest ok = no
   writable = no
   create mask = 0700
[pcl2pdf]
   comment =
   path = /var/spool/pcl2pdf #chmod 1777
   print command = /usr/local/bin/pdf2 '%f' '%m' '%I' '/home/temp' #tried cups, no effect
   guest ok = yes
   printable = yes
   browsable = yes
   writable = no
   use client driver = yes
[print$]
   comment = Printer Drivers
   path = /var/lib/samba/printers
   browseable = no
   read only = yes
   guest ok = no