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[PATCH] suspend: update documentation

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Update suspend documentation.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Pavel Machek 2005-09-03 15:56:56 -07:00 committed by Linus Torvalds
parent 7dc24db175
commit 7e958883bc
2 changed files with 15 additions and 1 deletions
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7
Documentation/power/swsusp.txt
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@ -311,3 +311,10 @@ As a rule of thumb use encrypted swap to protect your data while your
system is shut down or suspended. Additionally use the encrypted
suspend image to prevent sensitive data from being stolen after
resume.
Q: Why we cannot suspend to a swap file?
A: Because accessing swap file needs the filesystem mounted, and
filesystem might do something wrong (like replaying the journal)
during mount. [Probably could be solved by modifying every filesystem
to support some kind of "really read-only!" option. Patches welcome.]

9
Documentation/power/video.txt
View file

@ -46,6 +46,12 @@ There are a few types of systems where video works after S3 resume:
POSTing bios works. Ole Rohne has patch to do just that at
http://dev.gentoo.org/~marineam/patch-radeonfb-2.6.11-rc2-mm2.
(8) on some systems, you can use the video_post utility mentioned here:
http://bugzilla.kernel.org/show_bug.cgi?id=3670. Do echo 3 > /sys/power/state
&& /usr/sbin/video_post - which will initialize the display in console mode.
If you are in X, you can switch to a virtual terminal and back to X using
CTRL+ALT+F1 - CTRL+ALT+F7 to get the display working in graphical mode again.
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
@ -64,7 +70,8 @@ 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 C110 video_post (8)
Acer TM C300 vga=normal (only suspend on console, not in X), vbetool (6) or video_post (8)
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