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 (8) on some systems, you can use the video_post utility mentioned here:
50 http://bugzilla.kernel.org/show_bug.cgi?id=3670. Do echo 3 > /sys/power/state
51 && /usr/sbin/video_post - which will initialize the display in console mode.
52 If you are in X, you can switch to a virtual terminal and back to X using
53 CTRL+ALT+F1 - CTRL+ALT+F7 to get the display working in graphical mode again.
55 Now, if you pass acpi_sleep=something, and it does not work with your
56 bios, you'll get a hard crash during resume. Be careful. Also it is
57 safest to do your experiments with plain old VGA console. The vesafb
58 and radeonfb (etc) drivers have a tendency to crash the machine during
61 You may have a system where none of above works. At that point you
62 either invent another ugly hack that works, or write proper driver for
63 your video card (good luck getting docs :-(). Maybe suspending from X
64 (proper X, knowing your hardware, not XF68_FBcon) might have better
67 Table of known working systems:
69 Model hack (or "how to do it")
70 ------------------------------------------------------------------------------
71 Acer Aspire 1406LC ole's late BIOS init (7), turn off DRI
72 Acer TM 242FX vbetool (6)
73 Acer TM C110 video_post (8)
74 Acer TM C300 vga=normal (only suspend on console, not in X), vbetool (6) or video_post (8)
75 Acer TM 4052LCi s3_bios (2)
76 Acer TM 636Lci s3_bios vga=normal (2)
77 Acer TM 650 (Radeon M7) vga=normal plus boot-radeon (5) gets text console back
79 Acer TM 800 vga=normal, X patches, see webpage (5) or vbetool (6)
80 Acer TM 803 vga=normal, X patches, see webpage (5) or vbetool (6)
81 Acer TM 803LCi vga=normal, vbetool (6)
82 Arima W730a vbetool needed (6)
83 Asus L2400D s3_mode (3)(***) (S1 also works OK)
84 Asus L3350M (SiS 740) (6)
85 Asus L3800C (Radeon M7) s3_bios (2) (S1 also works OK)
86 Asus M6887Ne vga=normal, s3_bios (2), use radeon driver instead of fglrx in x.org
87 Athlon64 desktop prototype s3_bios (2)
89 Compaq Armada E500 - P3-700 none (1) (S1 also works OK)
90 Compaq Evo N620c vga=normal, s3_bios (2)
91 Dell 600m, ATI R250 Lf none (1), but needs xorg-x11-6.8.1.902-1
92 Dell D600, ATI RV250 vga=normal and X, or try vbestate (6)
93 Dell D610 vga=normal and X (possibly vbestate (6) too, but not tested)
94 Dell Inspiron 4000 ??? (*)
95 Dell Inspiron 500m ??? (*)
96 Dell Inspiron 510m ???
97 Dell Inspiron 600m ??? (*)
98 Dell Inspiron 8200 ??? (*)
99 Dell Inspiron 8500 ??? (*)
100 Dell Inspiron 8600 ??? (*)
101 eMachines athlon64 machines vbetool needed (6) (someone please get me model #s)
102 HP NC6000 s3_bios, may not use radeonfb (2); or vbetool (6)
104 HP Pavilion ZD7000 vbetool post needed, need open-source nv driver for X
105 HP Omnibook XE3 athlon version none (1)
106 HP Omnibook XE3GC none (1), video is S3 Savage/IX-MV
107 IBM TP T20, model 2647-44G none (1), video is S3 Inc. 86C270-294 Savage/IX-MV, vesafb gets "interesting" but X work.
108 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 :-(]
109 IBM TP R32 / Type 2658-MMG none (1)
110 IBM TP R40 2722B3G ??? (*)
111 IBM TP R50p / Type 1832-22U s3_bios (2)
113 IBM TP T30 236681A ??? (*)
114 IBM TP T40 / Type 2373-MU4 none (1)
116 IBM TP R40p s3_bios (2)
117 IBM TP T41p s3_bios (2), switch to X after resume
118 IBM TP T42 s3_bios (2)
119 IBM ThinkPad T42p (2373-GTG) s3_bios (2)
121 IBM TP X30 s3_bios (2)
122 IBM TP X31 / Type 2672-XXH none (1), use radeontool (http://fdd.com/software/radeon/) to turn off backlight.
123 IBM TP X32 none (1), but backlight is on and video is trashed after long suspend
124 IBM Thinkpad X40 Type 2371-7JG s3_bios,s3_mode (4)
125 Medion MD4220 ??? (*)
126 Samsung P35 vbetool needed (6)
127 Sharp PC-AR10 (ATI rage) none (1)
128 Sony Vaio PCG-C1VRX/K s3_bios (2)
129 Sony Vaio PCG-F403 ??? (*)
130 Sony Vaio PCG-N505SN ??? (*)
131 Sony Vaio vgn-s260 X or boot-radeon can init it (5)
132 Toshiba Libretto L5 none (1)
133 Toshiba Satellite 4030CDT s3_mode (3)
134 Toshiba Satellite 4080XCDT s3_mode (3)
135 Toshiba Satellite 4090XCDT ??? (*)
136 Toshiba Satellite P10-554 s3_bios,s3_mode (4)(****)
137 Toshiba M30 (2) xor X with nvidia driver using internal AGP
138 Uniwill 244IIO ??? (*)
141 (*) from http://www.ubuntulinux.org/wiki/HoaryPMResults, not sure
142 which options to use. If you know, please tell me.
144 (***) To be tested with a newer kernel.
146 (****) Not with SMP kernel, UP only.
150 (with thanks to Carl-Daniel Hailfinger)
152 First, boot into X and run the following script ONCE:
154 statedir=/root/s3/state
158 vbetool vbestate save >$statedir/vbe
161 To suspend and resume properly, call the following script as root:
163 statedir=/root/s3/state
165 fuser /dev/tty$curcons 2>/dev/null|xargs ps -o comm= -p|grep -q X && chvt 2
166 cat /dev/vcsa >$statedir/vcsa
168 echo 3 >/proc/acpi/sleep
171 vbetool vbestate restore <$statedir/vbe
172 cat $statedir/vcsa >/dev/vcsa
178 Unless you change your graphics card or other hardware configuration,
179 the state once saved will be OK for every resume afterwards.
180 NOTE: The "rckbd restart" command may be different for your
181 distribution. Simply replace it with the command you would use to
182 set the fonts on screen.