Video issues with S3 resume ~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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 it. Unfortunately there's one exception: video card. Those are usually initialized by BIOS, and kernel does not have enough information to boot video card. (Kernel usually does not even contain video card 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. S3 has absolutely no chance of working with SMP/HT. Be sure it to turn it off before testing (swsusp should work ok, OTOH). There are a few types of systems where video works after S3 resume: (1) systems where video state is preserved over S3. (2) systems where it is possible to call the video BIOS during S3 resume. Unfortunately, it is not correct to call the video BIOS at that point, but it happens to work on some machines. Use acpi_sleep=s3_bios. (3) systems that initialize video card into vga text mode and where the BIOS works well enough to be able to set video mode. Use acpi_sleep=s3_mode on these. (4) on some systems s3_bios kicks video into text mode, and acpi_sleep=s3_bios,s3_mode is needed. (5) radeon systems, where X can soft-boot your video card. You'll need new enough X, and plain text console (no vesafb or radeonfb), see 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 be working. Do vbetool vbestate save > /tmp/delme; echo 3 > /proc/acpi/sleep; vbetool post; vbetool vbestate restore < /tmp/delme; setfont , and your video should work. (7) on some systems, 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 a hard crash during resume. Be careful. Also it is safest to do your experiments with plain old VGA console. The vesafb and radeonfb (etc) drivers have a tendency to crash the machine during resume. You may have a 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 C300 vga=normal (only suspend on console, not in X), 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) or vbetool (6) Acer TM 803 vga=normal, X patches, see webpage (5) or vbetool (6) Acer TM 803LCi vga=normal, vbetool (6) 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) Compaq Evo N620c vga=normal, s3_bios (2) Dell 600m, ATI R250 Lf none (1), but needs xorg-x11-6.8.1.902-1 Dell D600, ATI RV250 vga=normal and X, 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); or vbetool (6) HP NX7000 ??? (*) HP Pavilion ZD7000 vbetool post needed, need open-source nv driver for X HP Omnibook XE3 athlon version none (1) HP Omnibook XE3GC none (1), video is S3 Savage/IX-MV IBM TP T20, model 2647-44G none (1), video is S3 Inc. 86C270-294 Savage/IX-MV, vesafb gets "interesting" but X work. 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 none (1) IBM TP R40p s3_bios (2) IBM TP T41p s3_bios (2), switch to X after resume 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 Thinkpad X40 Type 2371-7JG s3_bios,s3_mode (4) 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 Libretto L5 none (1) 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. (***) 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 graphics 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.