Update suspend documentation.
Signed-off-by: Pavel Machek <[email protected]>
---
commit 8972d0ff145879e53416ac77c4cd096fd3cfe227
tree f901592e816f4cfae7383f443b21a13f67a644f8
parent a6500a8820a9b271105fe92e5d3013f7c2875b44
author <pavel@amd.(none)> Tue, 12 Jul 2005 11:04:31 +0200
committer <pavel@amd.(none)> Tue, 12 Jul 2005 11:04:31 +0200
Documentation/power/swsusp.txt | 7 +++++++
Documentation/power/video.txt | 9 ++++++++-
2 files changed, 15 insertions(+), 1 deletions(-)
diff --git a/Documentation/power/swsusp.txt b/Documentation/power/swsusp.txt
--- a/Documentation/power/swsusp.txt
+++ b/Documentation/power/swsusp.txt
@@ -318,3 +318,10 @@ As a rule of thumb use encrypted swap to
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.]
diff --git a/Documentation/power/video.txt b/Documentation/power/video.txt
--- a/Documentation/power/video.txt
+++ b/Documentation/power/video.txt
@@ -46,6 +46,12 @@ There are a few types of systems where v
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
------------------------------------------------------------------------------
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
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