video.rst (9005B)
1=========================== 2Video issues with S3 resume 3=========================== 4 52003-2006, Pavel Machek 6 7During S3 resume, hardware needs to be reinitialized. For most 8devices, this is easy, and kernel driver knows how to do 9it. Unfortunately there's one exception: video card. Those are usually 10initialized by BIOS, and kernel does not have enough information to 11boot video card. (Kernel usually does not even contain video card 12driver -- vesafb and vgacon are widely used). 13 14This is not problem for swsusp, because during swsusp resume, BIOS is 15run normally so video card is normally initialized. It should not be 16problem for S1 standby, because hardware should retain its state over 17that. 18 19We either have to run video BIOS during early resume, or interpret it 20using vbetool later, or maybe nothing is necessary on particular 21system because video state is preserved. Unfortunately different 22methods work on different systems, and no known method suits all of 23them. 24 25Userland application called s2ram has been developed; it contains long 26whitelist of systems, and automatically selects working method for a 27given system. It can be downloaded from CVS at 28www.sf.net/projects/suspend . If you get a system that is not in the 29whitelist, please try to find a working solution, and submit whitelist 30entry so that work does not need to be repeated. 31 32Currently, VBE_SAVE method (6 below) works on most 33systems. Unfortunately, vbetool only runs after userland is resumed, 34so it makes debugging of early resume problems 35hard/impossible. Methods that do not rely on userland are preferable. 36 37Details 38~~~~~~~ 39 40There are a few types of systems where video works after S3 resume: 41 42(1) systems where video state is preserved over S3. 43 44(2) systems where it is possible to call the video BIOS during S3 45 resume. Unfortunately, it is not correct to call the video BIOS at 46 that point, but it happens to work on some machines. Use 47 acpi_sleep=s3_bios. 48 49(3) systems that initialize video card into vga text mode and where 50 the BIOS works well enough to be able to set video mode. Use 51 acpi_sleep=s3_mode on these. 52 53(4) on some systems s3_bios kicks video into text mode, and 54 acpi_sleep=s3_bios,s3_mode is needed. 55 56(5) radeon systems, where X can soft-boot your video card. You'll need 57 a new enough X, and a plain text console (no vesafb or radeonfb). See 58 http://www.doesi.gmxhome.de/linux/tm800s3/s3.html for more information. 59 Alternatively, you should use vbetool (6) instead. 60 61(6) other radeon systems, where vbetool is enough to bring system back 62 to life. It needs text console to be working. Do vbetool vbestate 63 save > /tmp/delme; echo 3 > /proc/acpi/sleep; vbetool post; vbetool 64 vbestate restore < /tmp/delme; setfont <whatever>, and your video 65 should work. 66 67(7) on some systems, it is possible to boot most of kernel, and then 68 POSTing bios works. Ole Rohne has patch to do just that at 69 http://dev.gentoo.org/~marineam/patch-radeonfb-2.6.11-rc2-mm2. 70 71(8) on some systems, you can use the video_post utility and or 72 do echo 3 > /sys/power/state && /usr/sbin/video_post - which will 73 initialize the display in console mode. If you are in X, you can switch 74 to a virtual terminal and back to X using CTRL+ALT+F1 - CTRL+ALT+F7 to get 75 the display working in graphical mode again. 76 77Now, if you pass acpi_sleep=something, and it does not work with your 78bios, you'll get a hard crash during resume. Be careful. Also it is 79safest to do your experiments with plain old VGA console. The vesafb 80and radeonfb (etc) drivers have a tendency to crash the machine during 81resume. 82 83You may have a system where none of above works. At that point you 84either invent another ugly hack that works, or write proper driver for 85your video card (good luck getting docs :-(). Maybe suspending from X 86(proper X, knowing your hardware, not XF68_FBcon) might have better 87chance of working. 88 89Table of known working notebooks: 90 91 92=============================== =============================================== 93Model hack (or "how to do it") 94=============================== =============================================== 95Acer Aspire 1406LC ole's late BIOS init (7), turn off DRI 96Acer TM 230 s3_bios (2) 97Acer TM 242FX vbetool (6) 98Acer TM C110 video_post (8) 99Acer TM C300 vga=normal (only suspend on console, not in X), 100 vbetool (6) or video_post (8) 101Acer TM 4052LCi s3_bios (2) 102Acer TM 636Lci s3_bios,s3_mode (4) 103Acer TM 650 (Radeon M7) vga=normal plus boot-radeon (5) gets text 104 console back 105Acer TM 660 ??? [#f1]_ 106Acer TM 800 vga=normal, X patches, see webpage (5) 107 or vbetool (6) 108Acer TM 803 vga=normal, X patches, see webpage (5) 109 or vbetool (6) 110Acer TM 803LCi vga=normal, vbetool (6) 111Arima W730a vbetool needed (6) 112Asus L2400D s3_mode (3) [#f2]_ (S1 also works OK) 113Asus L3350M (SiS 740) (6) 114Asus L3800C (Radeon M7) s3_bios (2) (S1 also works OK) 115Asus M6887Ne vga=normal, s3_bios (2), use radeon driver 116 instead of fglrx in x.org 117Athlon64 desktop prototype s3_bios (2) 118Compal CL-50 ??? [#f1]_ 119Compaq Armada E500 - P3-700 none (1) (S1 also works OK) 120Compaq Evo N620c vga=normal, s3_bios (2) 121Dell 600m, ATI R250 Lf none (1), but needs xorg-x11-6.8.1.902-1 122Dell D600, ATI RV250 vga=normal and X, or try vbestate (6) 123Dell D610 vga=normal and X (possibly vbestate (6) too, 124 but not tested) 125Dell Inspiron 4000 ??? [#f1]_ 126Dell Inspiron 500m ??? [#f1]_ 127Dell Inspiron 510m ??? 128Dell Inspiron 5150 vbetool needed (6) 129Dell Inspiron 600m ??? [#f1]_ 130Dell Inspiron 8200 ??? [#f1]_ 131Dell Inspiron 8500 ??? [#f1]_ 132Dell Inspiron 8600 ??? [#f1]_ 133eMachines athlon64 machines vbetool needed (6) (someone please get 134 me model #s) 135HP NC6000 s3_bios, may not use radeonfb (2); 136 or vbetool (6) 137HP NX7000 ??? [#f1]_ 138HP Pavilion ZD7000 vbetool post needed, need open-source nv 139 driver for X 140HP Omnibook XE3 athlon version none (1) 141HP Omnibook XE3GC none (1), video is S3 Savage/IX-MV 142HP Omnibook XE3L-GF vbetool (6) 143HP Omnibook 5150 none (1), (S1 also works OK) 144IBM TP T20, model 2647-44G none (1), video is S3 Inc. 86C270-294 145 Savage/IX-MV, vesafb gets "interesting" 146 but X work. 147IBM TP A31 / Type 2652-M5G s3_mode (3) [works ok with 148 BIOS 1.04 2002-08-23, but not at all with 149 BIOS 1.11 2004-11-05 :-(] 150IBM TP R32 / Type 2658-MMG none (1) 151IBM TP R40 2722B3G ??? [#f1]_ 152IBM TP R50p / Type 1832-22U s3_bios (2) 153IBM TP R51 none (1) 154IBM TP T30 236681A ??? [#f1]_ 155IBM TP T40 / Type 2373-MU4 none (1) 156IBM TP T40p none (1) 157IBM TP R40p s3_bios (2) 158IBM TP T41p s3_bios (2), switch to X after resume 159IBM TP T42 s3_bios (2) 160IBM ThinkPad T42p (2373-GTG) s3_bios (2) 161IBM TP X20 ??? [#f1]_ 162IBM TP X30 s3_bios, s3_mode (4) 163IBM TP X31 / Type 2672-XXH none (1), use radeontool 164 (http://fdd.com/software/radeon/) to 165 turn off backlight. 166IBM TP X32 none (1), but backlight is on and video is 167 trashed after long suspend. s3_bios, 168 s3_mode (4) works too. Perhaps that gets 169 better results? 170IBM Thinkpad X40 Type 2371-7JG s3_bios,s3_mode (4) 171IBM TP 600e none(1), but a switch to console and 172 back to X is needed 173Medion MD4220 ??? [#f1]_ 174Samsung P35 vbetool needed (6) 175Sharp PC-AR10 (ATI rage) none (1), backlight does not switch off 176Sony Vaio PCG-C1VRX/K s3_bios (2) 177Sony Vaio PCG-F403 ??? [#f1]_ 178Sony Vaio PCG-GRT995MP none (1), works with 'nv' X driver 179Sony Vaio PCG-GR7/K none (1), but needs radeonfb, use 180 radeontool (http://fdd.com/software/radeon/) 181 to turn off backlight. 182Sony Vaio PCG-N505SN ??? [#f1]_ 183Sony Vaio vgn-s260 X or boot-radeon can init it (5) 184Sony Vaio vgn-S580BH vga=normal, but suspend from X. Console will 185 be blank unless you return to X. 186Sony Vaio vgn-FS115B s3_bios (2),s3_mode (4) 187Toshiba Libretto L5 none (1) 188Toshiba Libretto 100CT/110CT vbetool (6) 189Toshiba Portege 3020CT s3_mode (3) 190Toshiba Satellite 4030CDT s3_mode (3) (S1 also works OK) 191Toshiba Satellite 4080XCDT s3_mode (3) (S1 also works OK) 192Toshiba Satellite 4090XCDT ??? [#f1]_ 193Toshiba Satellite P10-554 s3_bios,s3_mode (4)[#f3]_ 194Toshiba M30 (2) xor X with nvidia driver using internal AGP 195Uniwill 244IIO ??? [#f1]_ 196=============================== =============================================== 197 198Known working desktop systems 199~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 200 201=================== ============================= ======================== 202Mainboard Graphics card hack (or "how to do it") 203=================== ============================= ======================== 204Asus A7V8X nVidia RIVA TNT2 model 64 s3_bios,s3_mode (4) 205=================== ============================= ======================== 206 207 208.. [#f1] from https://wiki.ubuntu.com/HoaryPMResults, not sure 209 which options to use. If you know, please tell me. 210 211.. [#f2] To be tested with a newer kernel. 212 213.. [#f3] Not with SMP kernel, UP only.