| |
| 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 <whatever>, 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. |
