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1
2 Video issues with S3 resume
3 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
4 2003-2006, Pavel Machek
5
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).
12
13 This is not problem for swsusp, because during swsusp resume, BIOS is
14 run normally so video card is normally initialized. It should not be
15 problem for S1 standby, because hardware should retain its state over
16 that.
17
18 We either have to run video BIOS during early resume, or interpret it
19 using vbetool later, or maybe nothing is necessary on particular
20 system because video state is preserved. Unfortunately different
21 methods work on different systems, and no known method suits all of
22 them.
23
24 Userland application called s2ram has been developed; it contains long
25 whitelist of systems, and automatically selects working method for a
26 given system. It can be downloaded from CVS at
27 www.sf.net/projects/suspend . If you get a system that is not in the
28 whitelist, please try to find a working solution, and submit whitelist
29 entry so that work does not need to be repeated.
30
31 Currently, VBE_SAVE method (6 below) works on most
32 systems. Unfortunately, vbetool only runs after userland is resumed,
33 so it makes debugging of early resume problems
34 hard/impossible. Methods that do not rely on userland are preferable.
35
36 Details
37 ~~~~~~~
38
39 There are a few types of systems where video works after S3 resume:
40
41 (1) systems where video state is preserved over S3.
42
43 (2) systems where it is possible to call the video BIOS during S3
44 resume. Unfortunately, it is not correct to call the video BIOS at
45 that point, but it happens to work on some machines. Use
46 acpi_sleep=s3_bios.
47
48 (3) systems that initialize video card into vga text mode and where
49 the BIOS works well enough to be able to set video mode. Use
50 acpi_sleep=s3_mode on these.
51
52 (4) on some systems s3_bios kicks video into text mode, and
53 acpi_sleep=s3_bios,s3_mode is needed.
54
55 (5) radeon systems, where X can soft-boot your video card. You'll need
56 a new enough X, and a plain text console (no vesafb or radeonfb). See
57 http://www.doesi.gmxhome.de/linux/tm800s3/s3.html for more information.
58 Alternatively, you should use vbetool (6) instead.
59
60 (6) other radeon systems, where vbetool is enough to bring system back
61 to life. It needs text console to be working. Do vbetool vbestate
62 save > /tmp/delme; echo 3 > /proc/acpi/sleep; vbetool post; vbetool
63 vbestate restore < /tmp/delme; setfont <whatever>, and your video
64 should work.
65
66 (7) on some systems, it is possible to boot most of kernel, and then
67 POSTing bios works. Ole Rohne has patch to do just that at
68 http://dev.gentoo.org/~marineam/patch-radeonfb-2.6.11-rc2-mm2.
69
70 (8) on some systems, you can use the video_post utility and or
71 do echo 3 > /sys/power/state && /usr/sbin/video_post - which will
72 initialize the display in console mode. If you are in X, you can switch
73 to a virtual terminal and back to X using CTRL+ALT+F1 - CTRL+ALT+F7 to get
74 the display working in graphical mode again.
75
76 Now, if you pass acpi_sleep=something, and it does not work with your
77 bios, you'll get a hard crash during resume. Be careful. Also it is
78 safest to do your experiments with plain old VGA console. The vesafb
79 and radeonfb (etc) drivers have a tendency to crash the machine during
80 resume.
81
82 You may have a system where none of above works. At that point you
83 either invent another ugly hack that works, or write proper driver for
84 your video card (good luck getting docs :-(). Maybe suspending from X
85 (proper X, knowing your hardware, not XF68_FBcon) might have better
86 chance of working.
87
88 Table of known working notebooks:
89
90 Model hack (or "how to do it")
91 ------------------------------------------------------------------------------
92 Acer Aspire 1406LC ole's late BIOS init (7), turn off DRI
93 Acer TM 230 s3_bios (2)
94 Acer TM 242FX vbetool (6)
95 Acer TM C110 video_post (8)
96 Acer TM C300 vga=normal (only suspend on console, not in X), vbetool (6) or video_post (8)
97 Acer TM 4052LCi s3_bios (2)
98 Acer TM 636Lci s3_bios,s3_mode (4)
99 Acer TM 650 (Radeon M7) vga=normal plus boot-radeon (5) gets text console back
100 Acer TM 660 ??? (*)
101 Acer TM 800 vga=normal, X patches, see webpage (5) or vbetool (6)
102 Acer TM 803 vga=normal, X patches, see webpage (5) or vbetool (6)
103 Acer TM 803LCi vga=normal, vbetool (6)
104 Arima W730a vbetool needed (6)
105 Asus L2400D s3_mode (3)(***) (S1 also works OK)
106 Asus L3350M (SiS 740) (6)
107 Asus L3800C (Radeon M7) s3_bios (2) (S1 also works OK)
108 Asus M6887Ne vga=normal, s3_bios (2), use radeon driver instead of fglrx in x.org
109 Athlon64 desktop prototype s3_bios (2)
110 Compal CL-50 ??? (*)
111 Compaq Armada E500 - P3-700 none (1) (S1 also works OK)
112 Compaq Evo N620c vga=normal, s3_bios (2)
113 Dell 600m, ATI R250 Lf none (1), but needs xorg-x11-6.8.1.902-1
114 Dell D600, ATI RV250 vga=normal and X, or try vbestate (6)
115 Dell D610 vga=normal and X (possibly vbestate (6) too, but not tested)
116 Dell Inspiron 4000 ??? (*)
117 Dell Inspiron 500m ??? (*)
118 Dell Inspiron 510m ???
119 Dell Inspiron 5150 vbetool needed (6)
120 Dell Inspiron 600m ??? (*)
121 Dell Inspiron 8200 ??? (*)
122 Dell Inspiron 8500 ??? (*)
123 Dell Inspiron 8600 ??? (*)
124 eMachines athlon64 machines vbetool needed (6) (someone please get me model #s)
125 HP NC6000 s3_bios, may not use radeonfb (2); or vbetool (6)
126 HP NX7000 ??? (*)
127 HP Pavilion ZD7000 vbetool post needed, need open-source nv driver for X
128 HP Omnibook XE3 athlon version none (1)
129 HP Omnibook XE3GC none (1), video is S3 Savage/IX-MV
130 HP Omnibook XE3L-GF vbetool (6)
131 HP Omnibook 5150 none (1), (S1 also works OK)
132 IBM TP T20, model 2647-44G none (1), video is S3 Inc. 86C270-294 Savage/IX-MV, vesafb gets "interesting" but X work.
133 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 :-(]
134 IBM TP R32 / Type 2658-MMG none (1)
135 IBM TP R40 2722B3G ??? (*)
136 IBM TP R50p / Type 1832-22U s3_bios (2)
137 IBM TP R51 none (1)
138 IBM TP T30 236681A ??? (*)
139 IBM TP T40 / Type 2373-MU4 none (1)
140 IBM TP T40p none (1)
141 IBM TP R40p s3_bios (2)
142 IBM TP T41p s3_bios (2), switch to X after resume
143 IBM TP T42 s3_bios (2)
144 IBM ThinkPad T42p (2373-GTG) s3_bios (2)
145 IBM TP X20 ??? (*)
146 IBM TP X30 s3_bios, s3_mode (4)
147 IBM TP X31 / Type 2672-XXH none (1), use radeontool (http://fdd.com/software/radeon/) to turn off backlight.
148 IBM TP X32 none (1), but backlight is on and video is trashed after long suspend. s3_bios,s3_mode (4) works too. Perhaps that gets better results?
149 IBM Thinkpad X40 Type 2371-7JG s3_bios,s3_mode (4)
150 IBM TP 600e none(1), but a switch to console and back to X is needed
151 Medion MD4220 ??? (*)
152 Samsung P35 vbetool needed (6)
153 Sharp PC-AR10 (ATI rage) none (1), backlight does not switch off
154 Sony Vaio PCG-C1VRX/K s3_bios (2)
155 Sony Vaio PCG-F403 ??? (*)
156 Sony Vaio PCG-GRT995MP none (1), works with 'nv' X driver
157 Sony Vaio PCG-GR7/K none (1), but needs radeonfb, use radeontool (http://fdd.com/software/radeon/) to turn off backlight.
158 Sony Vaio PCG-N505SN ??? (*)
159 Sony Vaio vgn-s260 X or boot-radeon can init it (5)
160 Sony Vaio vgn-S580BH vga=normal, but suspend from X. Console will be blank unless you return to X.
161 Sony Vaio vgn-FS115B s3_bios (2),s3_mode (4)
162 Toshiba Libretto L5 none (1)
163 Toshiba Libretto 100CT/110CT vbetool (6)
164 Toshiba Portege 3020CT s3_mode (3)
165 Toshiba Satellite 4030CDT s3_mode (3) (S1 also works OK)
166 Toshiba Satellite 4080XCDT s3_mode (3) (S1 also works OK)
167 Toshiba Satellite 4090XCDT ??? (*)
168 Toshiba Satellite P10-554 s3_bios,s3_mode (4)(****)
169 Toshiba M30 (2) xor X with nvidia driver using internal AGP
170 Uniwill 244IIO ??? (*)
171
172 Known working desktop systems
173 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
174
175 Mainboard Graphics card hack (or "how to do it")
176 ------------------------------------------------------------------------------
177 Asus A7V8X nVidia RIVA TNT2 model 64 s3_bios,s3_mode (4)
178
179
180 (*) from https://wiki.ubuntu.com/HoaryPMResults, not sure
181 which options to use. If you know, please tell me.
182
183 (***) To be tested with a newer kernel.
184
185 (****) Not with SMP kernel, UP only.