diff options
Diffstat (limited to 'Documentation/power')
-rw-r--r-- | Documentation/power/swsusp.txt | 7 | ||||
-rw-r--r-- | Documentation/power/video.txt | 9 |
2 files changed, 15 insertions, 1 deletions
diff --git a/Documentation/power/swsusp.txt b/Documentation/power/swsusp.txt index 7a6b78966459..ddf907fbcc05 100644 --- a/Documentation/power/swsusp.txt +++ b/Documentation/power/swsusp.txt | |||
@@ -311,3 +311,10 @@ As a rule of thumb use encrypted swap to protect your data while your | |||
311 | system is shut down or suspended. Additionally use the encrypted | 311 | system is shut down or suspended. Additionally use the encrypted |
312 | suspend image to prevent sensitive data from being stolen after | 312 | suspend image to prevent sensitive data from being stolen after |
313 | resume. | 313 | resume. |
314 | |||
315 | Q: Why we cannot suspend to a swap file? | ||
316 | |||
317 | A: Because accessing swap file needs the filesystem mounted, and | ||
318 | filesystem might do something wrong (like replaying the journal) | ||
319 | during mount. [Probably could be solved by modifying every filesystem | ||
320 | to support some kind of "really read-only!" option. Patches welcome.] | ||
diff --git a/Documentation/power/video.txt b/Documentation/power/video.txt index 7a4a5036d123..1a44e8acb54c 100644 --- a/Documentation/power/video.txt +++ b/Documentation/power/video.txt | |||
@@ -46,6 +46,12 @@ There are a few types of systems where video works after S3 resume: | |||
46 | POSTing bios works. Ole Rohne has patch to do just that at | 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. | 47 | http://dev.gentoo.org/~marineam/patch-radeonfb-2.6.11-rc2-mm2. |
48 | 48 | ||
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. | ||
54 | |||
49 | Now, if you pass acpi_sleep=something, and it does not work with your | 55 | 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 | 56 | 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 | 57 | safest to do your experiments with plain old VGA console. The vesafb |
@@ -64,7 +70,8 @@ Model hack (or "how to do it") | |||
64 | ------------------------------------------------------------------------------ | 70 | ------------------------------------------------------------------------------ |
65 | Acer Aspire 1406LC ole's late BIOS init (7), turn off DRI | 71 | Acer Aspire 1406LC ole's late BIOS init (7), turn off DRI |
66 | Acer TM 242FX vbetool (6) | 72 | Acer TM 242FX vbetool (6) |
67 | Acer TM C300 vga=normal (only suspend on console, not in X), 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) | ||
68 | Acer TM 4052LCi s3_bios (2) | 75 | Acer TM 4052LCi s3_bios (2) |
69 | Acer TM 636Lci s3_bios vga=normal (2) | 76 | Acer TM 636Lci s3_bios vga=normal (2) |
70 | Acer TM 650 (Radeon M7) vga=normal plus boot-radeon (5) gets text console back | 77 | Acer TM 650 (Radeon M7) vga=normal plus boot-radeon (5) gets text console back |