modinfo

solaris1:/root# modinfo
 Id Loadaddr   Size Info Rev Module Name
  0  1000000 1f0bb8   -   0  unix ()
  1  10af380 23c6b0   -   0  genunix ()
  2  1294a90   1620   -   0  platmod ()
  3  1295f00   d5c8   -   0  FJSV,SPARC64-VII ()
  5  129e000   4be8   1   1  specfs (filesystem for specfs)
  6  12a29e8   38a8   3   1  fifofs (filesystem for fifo)
  7 7afa0000  18750 218   1  dtrace (Dynamic Tracing)
  8  12a60c8   4248  16   1  devfs (devices filesystem 1.16)
  9  12a9f78  1c0a8   5   1  procfs (filesystem for proc)
 12  12c7248   39f8   1   1  TS (time sharing sched class)
 13  12ca460    8dc   -   1  TS_DPTBL (Time sharing dispatch table)
 14  12ca4f0  384a0   2   1  ufs (filesystem for ufs)
 15  1300138    21c   -   1  fssnap_if (File System Snapshot Interface)
 16  13002b0   1d28   1   1  rootnex (sun4 root nexus 1.15)
 17  1301b20    1bc  57   1  options (options driver)
..............


solaris1:/root# modinfo -c
 Id    Loadcnt Module Name                            State
  0          1 unix                             LOADED/INSTALLED
  1          1 genunix                          LOADED/INSTALLED
  2          1 platmod                          LOADED/INSTALLED
  3          1 FJSV,SPARC64-VII                 LOADED/INSTALLED
  4          0 cl_bootstrap                     UNLOADED/UNINSTALLED
  5          1 specfs                           LOADED/INSTALLED
  6          1 fifofs                           LOADED/INSTALLED
  7          1 dtrace                           LOADED/INSTALLED
  8          1 devfs                            LOADED/INSTALLED
  9          1 procfs                           LOADED/INSTALLED
 10          1 swapgeneric                      UNLOADED/UNINSTALLED
 11          0 lbl_edition                      UNLOADED/UNINSTALLED
 12          1 TS                               LOADED/INSTALLED
..............


modload - load a kernel module (filename)
modunload - unload a module (using module_id)

Solaris x86 - Console GUI and CLI

On Solaris x86 servers, Console can be launched from both GUI and the CLI.

start /SP/console

or

Web GUI -> Remote Control -> Launch Remote Console

Both the consoles can show the POSt and grub load process. 
But once the OS is loaded after the OS selection screen, one of the screen can go Black based on the eeprom setting.

eg)

MySolaris:/root# prtdiag -v | head -1
System Configuration: Sun Microsystems SUN FIRE X4250
MySolaris:/root#
MySolaris:/root# eeprom | grep console
console=text
MySolaris:/root#


If console = 'ttya' then the serial console (/SP/console) will be active
If console = 'text' then the VGA port (i.e., the redirected remote console) will be active.

If you change the eeprom console setting, an O/S reboot will be needed.