2 Video issues with S3 resume
3 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
4 2003-2005, Pavel Machek
6 During S3 resume, hardware needs to be reinitialized. For most
7 devices, this is easy, and kernel driver knows how to do
8 it. Unfortunately there's one exception: video card. Those are usually
9 initialized by BIOS, and kernel does not have enough information to
10 boot video card. (Kernel usually does not even contain video card
11 driver -- vesafb and vgacon are widely used).
13 This is not problem for swsusp, because during swsusp resume, BIOS is
14 run normally so video card is normally initialized. S3 has absolutely
15 no chance of working with SMP/HT. Be sure it to turn it off before
16 testing (swsusp should work ok, OTOH).
18 There are a few types of systems where video works after S3 resume:
20 (1) systems where video state is preserved over S3.
22 (2) systems where it is possible to call the video BIOS during S3
23 resume. Unfortunately, it is not correct to call the video BIOS at
24 that point, but it happens to work on some machines. Use
27 (3) systems that initialize video card into vga text mode and where
28 the BIOS works well enough to be able to set video mode. Use
29 acpi_sleep=s3_mode on these.
31 (4) on some systems s3_bios kicks video into text mode, and
32 acpi_sleep=s3_bios,s3_mode is needed.
34 (5) radeon systems, where X can soft-boot your video card. You'll need
35 a new enough X, and a plain text console (no vesafb or radeonfb). See
36 http://www.doesi.gmxhome.de/linux/tm800s3/s3.html for more information.
37 Alternatively, you should use vbetool (6) instead.
39 (6) other radeon systems, where vbetool is enough to bring system back
40 to life. It needs text console to be working. Do vbetool vbestate
41 save > /tmp/delme; echo 3 > /proc/acpi/sleep; vbetool post; vbetool
42 vbestate restore < /tmp/delme; setfont <whatever>, and your video
45 (7) on some systems, it is possible to boot most of kernel, and then
46 POSTing bios works. Ole Rohne has patch to do just that at
47 http://dev.gentoo.org/~marineam/patch-radeonfb-2.6.11-rc2-mm2.
49 Now, if you pass acpi_sleep=something, and it does not work with your
50 bios, you'll get a hard crash during resume. Be careful. Also it is
51 safest to do your experiments with plain old VGA console. The vesafb
52 and radeonfb (etc) drivers have a tendency to crash the machine during
55 You may have a system where none of above works. At that point you
56 either invent another ugly hack that works, or write proper driver for
57 your video card (good luck getting docs :-(). Maybe suspending from X
58 (proper X, knowing your hardware, not XF68_FBcon) might have better
61 Table of known working systems:
63 Model hack (or "how to do it")
64 ------------------------------------------------------------------------------
65 Acer Aspire 1406LC ole's late BIOS init (7), turn off DRI
66 Acer TM 242FX vbetool (6)
67 Acer TM C300 vga=normal (only suspend on console, not in X), vbetool (6)
68 Acer TM 4052LCi s3_bios (2)
69 Acer TM 636Lci s3_bios vga=normal (2)
70 Acer TM 650 (Radeon M7) vga=normal plus boot-radeon (5) gets text console back
72 Acer TM 800 vga=normal, X patches, see webpage (5) or vbetool (6)
73 Acer TM 803 vga=normal, X patches, see webpage (5) or vbetool (6)
74 Acer TM 803LCi vga=normal, vbetool (6)
75 Arima W730a vbetool needed (6)
76 Asus L2400D s3_mode (3)(***) (S1 also works OK)
77 Asus L3350M (SiS 740) (6)
78 Asus L3800C (Radeon M7) s3_bios (2) (S1 also works OK)
79 Asus M6887Ne vga=normal, s3_bios (2), use radeon driver instead of fglrx in x.org
80 Athlon64 desktop prototype s3_bios (2)
82 Compaq Armada E500 - P3-700 none (1) (S1 also works OK)
83 Compaq Evo N620c vga=normal, s3_bios (2)
84 Dell 600m, ATI R250 Lf none (1), but needs xorg-x11-6.8.1.902-1
85 Dell D600, ATI RV250 vga=normal and X, or try vbestate (6)
86 Dell Inspiron 4000 ??? (*)
87 Dell Inspiron 500m ??? (*)
88 Dell Inspiron 600m ??? (*)
89 Dell Inspiron 8200 ??? (*)
90 Dell Inspiron 8500 ??? (*)
91 Dell Inspiron 8600 ??? (*)
92 eMachines athlon64 machines vbetool needed (6) (someone please get me model #s)
93 HP NC6000 s3_bios, may not use radeonfb (2); or vbetool (6)
95 HP Pavilion ZD7000 vbetool post needed, need open-source nv driver for X
96 HP Omnibook XE3 athlon version none (1)
97 HP Omnibook XE3GC none (1), video is S3 Savage/IX-MV
98 IBM TP T20, model 2647-44G none (1), video is S3 Inc. 86C270-294 Savage/IX-MV, vesafb gets "interesting" but X work.
99 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 :-(]
100 IBM TP R32 / Type 2658-MMG none (1)
101 IBM TP R40 2722B3G ??? (*)
102 IBM TP R50p / Type 1832-22U s3_bios (2)
104 IBM TP T30 236681A ??? (*)
105 IBM TP T40 / Type 2373-MU4 none (1)
107 IBM TP R40p s3_bios (2)
108 IBM TP T41p s3_bios (2), switch to X after resume
109 IBM TP T42 s3_bios (2)
110 IBM ThinkPad T42p (2373-GTG) s3_bios (2)
112 IBM TP X30 s3_bios (2)
113 IBM TP X31 / Type 2672-XXH none (1), use radeontool (http://fdd.com/software/radeon/) to turn off backlight.
114 IBM Thinkpad X40 Type 2371-7JG s3_bios,s3_mode (4)
115 Medion MD4220 ??? (*)
116 Samsung P35 vbetool needed (6)
117 Sharp PC-AR10 (ATI rage) none (1)
118 Sony Vaio PCG-F403 ??? (*)
119 Sony Vaio PCG-N505SN ??? (*)
120 Sony Vaio vgn-s260 X or boot-radeon can init it (5)
121 Toshiba Libretto L5 none (1)
122 Toshiba Satellite 4030CDT s3_mode (3)
123 Toshiba Satellite 4080XCDT s3_mode (3)
124 Toshiba Satellite 4090XCDT ??? (*)
125 Toshiba Satellite P10-554 s3_bios,s3_mode (4)(****)
126 Uniwill 244IIO ??? (*)
129 (*) from http://www.ubuntulinux.org/wiki/HoaryPMResults, not sure
130 which options to use. If you know, please tell me.
132 (***) To be tested with a newer kernel.
134 (****) Not with SMP kernel, UP only.
138 (with thanks to Carl-Daniel Hailfinger)
140 First, boot into X and run the following script ONCE:
142 statedir=/root/s3/state
146 vbetool vbestate save >$statedir/vbe
149 To suspend and resume properly, call the following script as root:
151 statedir=/root/s3/state
153 fuser /dev/tty$curcons 2>/dev/null|xargs ps -o comm= -p|grep -q X && chvt 2
154 cat /dev/vcsa >$statedir/vcsa
156 echo 3 >/proc/acpi/sleep
159 vbetool vbestate restore <$statedir/vbe
160 cat $statedir/vcsa >/dev/vcsa
166 Unless you change your graphics card or other hardware configuration,
167 the state once saved will be OK for every resume afterwards.
168 NOTE: The "rckbd restart" command may be different for your
169 distribution. Simply replace it with the command you would use to
170 set the fonts on screen.