Update suspend-to-RAM vs. video documentation

[Pavel Machek <pavel@ucw.cz>]

Hi!

We got quite long list of machines and tricks needed to get them
working. Please apply,
							Pavel
Signed-off-by: Pavel Machek <pavel@suse.cz>

--- clean-mm/Documentation/power/video.txt	2004-12-25 13:34:57.000000000 +0100
+++ linux-mm/Documentation/power/video.txt	2005-02-28 02:01:39.000000000 +0100
@@ -1,7 +1,7 @@
 
 		Video issues with S3 resume
 		~~~~~~~~~~~~~~~~~~~~~~~~~~~
-		  2003-2004, Pavel Machek
+		  2003-2005, Pavel Machek
 
 During S3 resume, hardware needs to be reinitialized. For most
 devices, this is easy, and kernel driver knows how to do
@@ -11,33 +11,159 @@
 driver -- vesafb and vgacon are widely used).
 
 This is not problem for swsusp, because during swsusp resume, BIOS is
-run normally so video card is normally initialized.
+run normally so video card is normally initialized. S3 has absolutely
+no change to work with SMP/HT. Be sure it to turn it off before
+testing (swsusp should work ok, OTOH).
 
-There are three types of systems where video works after S3 resume:
+There are few types of systems where video works after S3 resume:
 
-* systems where video state is preserved over S3. (Athlon HP Omnibook xe3s)
+(1) systems where video state is preserved over S3.
 
-* systems where it is possible to call video bios during S3
+(2) systems where it is possible to call video bios during S3
   resume. Unfortunately, it is not correct to call video BIOS at that
   point, but it happens to work on some machines. Use
-  acpi_sleep=s3_bios (Athlon64 desktop system)
+  acpi_sleep=s3_bios.
 
-* systems that initialize video card into vga text mode and where BIOS
+(3) systems that initialize video card into vga text mode and where BIOS
   works well enough to be able to set video mode. Use
-  acpi_sleep=s3_mode on these. (Toshiba 4030cdt)
+  acpi_sleep=s3_mode on these.
 
-* on some systems s3_bios kicks video into text mode, and
-  acpi_sleep=s3_bios,s3_mode is needed (Toshiba Satellite P10-554)
+(4) on some systems s3_bios kicks video into text mode, and
+  acpi_sleep=s3_bios,s3_mode is needed.
 
-* radeon systems, where X can soft-boot your video card. You'll need
+(5) radeon systems, where X can soft-boot your video card. You'll need
   patched X, and plain text console (no vesafb or radeonfb), see
-  http://www.doesi.gmxhome.de/linux/tm800s3/s3.html. (Acer TM 800)
+  http://www.doesi.gmxhome.de/linux/tm800s3/s3.html. Actually you
+  should probably use vbetool (6) instead.
+
+(6) other radeon systems, where vbetool is enough to bring system back
+  to life. It needs text console to work. Do vbetool vbestate save >
+  /tmp/delme; echo 3 > /proc/acpi/sleep; vbetool post; vbetool
+  vbestate restore < /tmp/delme; setfont <whatever>, and your video
+  should work.
+
+(7) on some system, it is possible to boot most of kernel, and then
+  POSTing bios works. Ole Rohne has patch to do just that at
+  http://dev.gentoo.org/~marineam/patch-radeonfb-2.6.11-rc2-mm2.
 
 Now, if you pass acpi_sleep=something, and it does not work with your
-bios, you'll get hard crash during resume. Be carefull.
+bios, you'll get hard crash during resume. Be carefull. Also it is
+safest to do your experiments with plain old VGA console. vesafb and
+radeonfb (etc) drivers have tendency to crash the machine during resume.
 
 You may have system where none of above works. At that point you
 either invent another ugly hack that works, or write proper driver for
 your video card (good luck getting docs :-(). Maybe suspending from X
 (proper X, knowing your hardware, not XF68_FBcon) might have better
 chance of working.
+
+Table of known working systems:
+
+Model                           hack (or "how to do it")
+------------------------------------------------------------------------------
+Acer Aspire 1406LC		ole's late BIOS init (7), turn off DRI
+Acer TM 242FX			vbetool (6)
+Acer TM 4052LCi		        s3_bios (2)
+Acer TM 636Lci			s3_bios vga=normal (2)
+Acer TM 650 (Radeon M7)		vga=normal plus boot-radeon (5) gets text console back
+Acer TM 660			??? (*)
+Acer TM 800			vga=normal, X patches, see webpage (5)
+Arima W730a			vbetool needed (6)
+Asus L2400D                     s3_mode (3)(***) (S1 also works OK)
+Asus L3800C (Radeon M7)		s3_bios (2) (S1 also works OK)
+Asus M6NE			??? (*)
+Athlon64 desktop prototype	s3_bios (2)
+Compal CL-50			??? (*)
+Compaq Armada E500 - P3-700     none (1) (S1 also works OK)
+Dell 600m, ATI R250 Lf		none (1), but needs xorg-x11-6.8.1.902-1
+Dell D600, ATI RV250            vga=normal (**), or try vbestate (6)
+Dell Inspiron 4000		??? (*)
+Dell Inspiron 500m		??? (*)
+Dell Inspiron 600m		??? (*)
+Dell Inspiron 8200		??? (*)
+Dell Inspiron 8500		??? (*)
+Dell Inspiron 8600		??? (*)
+eMachines athlon64 machines	vbetool needed (6) (someone please get me model #s)
+HP NC6000			s3_bios, may not use radeonfb (2)
+HP NX7000			??? (*)
+HP Pavilion ZD7000		vbetool post needed, need open-source nv driver for X
+HP Omnibook XE3	  		none (1)
+HP Omnibook XE3GC w/S3 Savage/IX-MV  none (1)
+IBM TP A31 / Type 2652-M5G      s3_mode (3) [works ok with BIOS 1.04 2002-08-23, but not at all with BIOS 1.11 2004-11-05 :-(]
+IBM TP R32 / Type 2658-MMG      none (1)
+IBM TP R40 2722B3G		??? (*)
+IBM TP R50p / Type 1832-22U     s3_bios (2)
+IBM TP R51			??? (*)
+IBM TP T30	236681A		??? (*)
+IBM TP T40 / Type 2373-MU4      none (1)
+IBM TP T40p			??? (*)
+IBM TP T41p			none (1)
+IBM TP T42			??? (*)
+IBM ThinkPad T42p (2373-GTG)	s3_bios (2)
+IBM TP X20			??? (*)
+IBM TP X30			??? (*)
+IBM TP X31 / Type 2672-XXH      none (1), use radeontool (http://fdd.com/software/radeon/) to turn off backlight.
+IBM TP X40			??? (*)
+Medion MD4220			??? (*)
+Samsung P35			vbetool needed (6)
+Sharp PC-AR10 (ATI rage)	none (1)
+Sony Vaio PCG-F403		??? (*)
+Sony Vaio PCG-N505SN		??? (*)
+Sony Vaio vgn-s260		X or boot-radeon can init it (5)
+Toshiba Satellite 4030CDT	s3_mode (3)
+Toshiba Satellite 4080XCDT      s3_mode (3)
+Toshiba Satellite 4090XCDT      ??? (*)
+Toshiba Satellite P10-554       s3_bios,s3_mode (4)(****)
+Uniwill 244IIO			??? (*)
+
+
+(*) from http://www.ubuntulinux.org/wiki/HoaryPMResults, not sure
+    which options to use. If you know, please tell me.
+
+(**) Text console is "strange" after resume. Backlight is switched on again
+     by the X server. X server is:
+     | X Window System Version 6.8.1.904 (6.8.2 RC 4)
+     | Release Date: 2 February 2005
+     | X Protocol Version 11, Revision 0, Release 6.8.1.904
+     | Build Operating System: SuSE Linux [ELF] SuSE
+     as present in SUSE 9.3preview3.
+
+(***) To be tested with a newer kernel.
+
+(****) Not with SMP kernel, UP only.
+
+VBEtool details
+~~~~~~~~~~~~~~~
+(with thanks to Carl-Daniel Hailfinger)
+
+First, boot into X and run the following script ONCE:
+#!/bin/bash
+statedir=/root/s3/state
+mkdir -p $statedir
+chvt 2
+sleep 1
+vbetool vbestate save >$statedir/vbe
+
+
+To suspend and resume properly, call the following script as root:
+#!/bin/bash
+statedir=/root/s3/state
+curcons=`fgconsole`
+fuser /dev/tty$curcons 2>/dev/null|xargs ps -o comm= -p|grep -q X && chvt 2
+cat /dev/vcsa >$statedir/vcsa
+sync
+echo 3 >/proc/acpi/sleep
+sync
+vbetool post
+vbetool vbestate restore <$statedir/vbe
+cat $statedir/vcsa >/dev/vcsa
+rckbd restart
+chvt $[curcons%6+1]
+chvt $curcons
+
+
+Unless you change your grahics card or other hardware configuration,
+the state once saved will be OK for every resume afterwards.
+NOTE: The "rckbd restart" command may be different for your
+distribution. Simply replace it with the command you would use to
+set the fonts on screen.

-- 
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