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Video issues with S3 resume
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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2003-2005, Pavel Machek
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During S3 resume, hardware needs to be reinitialized. For most
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devices, this is easy, and kernel driver knows how to do
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it. Unfortunately there's one exception: video card. Those are usually
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initialized by BIOS, and kernel does not have enough information to
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boot video card. (Kernel usually does not even contain video card
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driver -- vesafb and vgacon are widely used).
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This is not problem for swsusp, because during swsusp resume, BIOS is
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run normally so video card is normally initialized. S3 has absolutely
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no chance of working with SMP/HT. Be sure it to turn it off before
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testing (swsusp should work ok, OTOH).
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There are a few types of systems where video works after S3 resume:
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(1) systems where video state is preserved over S3.
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(2) systems where it is possible to call the video BIOS during S3
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resume. Unfortunately, it is not correct to call the video BIOS at
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that point, but it happens to work on some machines. Use
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acpi_sleep=s3_bios.
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(3) systems that initialize video card into vga text mode and where
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the BIOS works well enough to be able to set video mode. Use
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acpi_sleep=s3_mode on these.
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(4) on some systems s3_bios kicks video into text mode, and
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acpi_sleep=s3_bios,s3_mode is needed.
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(5) radeon systems, where X can soft-boot your video card. You'll need
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a new enough X, and a plain text console (no vesafb or radeonfb). See
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http://www.doesi.gmxhome.de/linux/tm800s3/s3.html for more information.
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Alternatively, you should use vbetool (6) instead.
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(6) other radeon systems, where vbetool is enough to bring system back
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to life. It needs text console to be working. Do vbetool vbestate
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save > /tmp/delme; echo 3 > /proc/acpi/sleep; vbetool post; vbetool
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vbestate restore < /tmp/delme; setfont <whatever>, and your video
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should work.
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(7) on some systems, it is possible to boot most of kernel, and then
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POSTing bios works. Ole Rohne has patch to do just that at
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http://dev.gentoo.org/~marineam/patch-radeonfb-2.6.11-rc2-mm2.
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Now, if you pass acpi_sleep=something, and it does not work with your
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bios, you'll get a hard crash during resume. Be careful. Also it is
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safest to do your experiments with plain old VGA console. The vesafb
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and radeonfb (etc) drivers have a tendency to crash the machine during
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resume.
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You may have a system where none of above works. At that point you
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either invent another ugly hack that works, or write proper driver for
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your video card (good luck getting docs :-(). Maybe suspending from X
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(proper X, knowing your hardware, not XF68_FBcon) might have better
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chance of working.
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Table of known working systems:
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Model hack (or "how to do it")
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------------------------------------------------------------------------------
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Acer Aspire 1406LC ole's late BIOS init (7), turn off DRI
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Acer TM 242FX vbetool (6)
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Acer TM C300 vga=normal (only suspend on console, not in X), vbetool (6)
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Acer TM 4052LCi s3_bios (2)
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Acer TM 636Lci s3_bios vga=normal (2)
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Acer TM 650 (Radeon M7) vga=normal plus boot-radeon (5) gets text console back
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Acer TM 660 ??? (*)
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Acer TM 800 vga=normal, X patches, see webpage (5) or vbetool (6)
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Acer TM 803 vga=normal, X patches, see webpage (5) or vbetool (6)
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Acer TM 803LCi vga=normal, vbetool (6)
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Arima W730a vbetool needed (6)
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Asus L2400D s3_mode (3)(***) (S1 also works OK)
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Asus L3350M (SiS 740) (6)
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Asus L3800C (Radeon M7) s3_bios (2) (S1 also works OK)
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Asus M6887Ne vga=normal, s3_bios (2), use radeon driver instead of fglrx in x.org
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Athlon64 desktop prototype s3_bios (2)
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Compal CL-50 ??? (*)
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Compaq Armada E500 - P3-700 none (1) (S1 also works OK)
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Compaq Evo N620c vga=normal, s3_bios (2)
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Dell 600m, ATI R250 Lf none (1), but needs xorg-x11-6.8.1.902-1
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Dell D600, ATI RV250 vga=normal and X, or try vbestate (6)
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Dell D610 vga=normal and X (possibly vbestate (6) too, but not tested)
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Dell Inspiron 4000 ??? (*)
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Dell Inspiron 500m ??? (*)
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Dell Inspiron 510m ???
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Dell Inspiron 600m ??? (*)
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Dell Inspiron 8200 ??? (*)
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Dell Inspiron 8500 ??? (*)
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Dell Inspiron 8600 ??? (*)
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eMachines athlon64 machines vbetool needed (6) (someone please get me model #s)
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HP NC6000 s3_bios, may not use radeonfb (2); or vbetool (6)
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HP NX7000 ??? (*)
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HP Pavilion ZD7000 vbetool post needed, need open-source nv driver for X
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HP Omnibook XE3 athlon version none (1)
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HP Omnibook XE3GC none (1), video is S3 Savage/IX-MV
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IBM TP T20, model 2647-44G none (1), video is S3 Inc. 86C270-294 Savage/IX-MV, vesafb gets "interesting" but X work.
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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 :-(]
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IBM TP R32 / Type 2658-MMG none (1)
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IBM TP R40 2722B3G ??? (*)
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IBM TP R50p / Type 1832-22U s3_bios (2)
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IBM TP R51 none (1)
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IBM TP T30 236681A ??? (*)
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IBM TP T40 / Type 2373-MU4 none (1)
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IBM TP T40p none (1)
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IBM TP R40p s3_bios (2)
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IBM TP T41p s3_bios (2), switch to X after resume
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IBM TP T42 s3_bios (2)
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IBM ThinkPad T42p (2373-GTG) s3_bios (2)
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IBM TP X20 ??? (*)
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IBM TP X30 s3_bios (2)
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IBM TP X31 / Type 2672-XXH none (1), use radeontool (http://fdd.com/software/radeon/) to turn off backlight.
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IBM Thinkpad X40 Type 2371-7JG s3_bios,s3_mode (4)
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Medion MD4220 ??? (*)
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Samsung P35 vbetool needed (6)
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Sharp PC-AR10 (ATI rage) none (1)
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Sony Vaio PCG-F403 ??? (*)
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Sony Vaio PCG-N505SN ??? (*)
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Sony Vaio vgn-s260 X or boot-radeon can init it (5)
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Toshiba Libretto L5 none (1)
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Toshiba Satellite 4030CDT s3_mode (3)
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Toshiba Satellite 4080XCDT s3_mode (3)
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Toshiba Satellite 4090XCDT ??? (*)
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Toshiba Satellite P10-554 s3_bios,s3_mode (4)(****)
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Toshiba M30 (2) xor X with nvidia driver using internal AGP
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Uniwill 244IIO ??? (*)
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(*) from http://www.ubuntulinux.org/wiki/HoaryPMResults, not sure
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which options to use. If you know, please tell me.
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(***) To be tested with a newer kernel.
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(****) Not with SMP kernel, UP only.
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VBEtool details
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~~~~~~~~~~~~~~~
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(with thanks to Carl-Daniel Hailfinger)
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First, boot into X and run the following script ONCE:
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#!/bin/bash
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statedir=/root/s3/state
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mkdir -p $statedir
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chvt 2
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sleep 1
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vbetool vbestate save >$statedir/vbe
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To suspend and resume properly, call the following script as root:
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#!/bin/bash
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statedir=/root/s3/state
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curcons=`fgconsole`
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fuser /dev/tty$curcons 2>/dev/null|xargs ps -o comm= -p|grep -q X && chvt 2
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cat /dev/vcsa >$statedir/vcsa
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sync
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echo 3 >/proc/acpi/sleep
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sync
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vbetool post
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vbetool vbestate restore <$statedir/vbe
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cat $statedir/vcsa >/dev/vcsa
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rckbd restart
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chvt $[curcons%6+1]
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chvt $curcons
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Unless you change your graphics card or other hardware configuration,
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the state once saved will be OK for every resume afterwards.
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NOTE: The "rckbd restart" command may be different for your
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distribution. Simply replace it with the command you would use to
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set the fonts on screen.
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