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[PATCH] swsusp: documentation updates
Update documentation a bit, add more machines to video.txt list. Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -350,9 +350,34 @@ Q: How do I make suspend more verbose?
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A: If you want to see any non-error kernel messages on the virtual
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terminal the kernel switches to during suspend, you have to set the
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kernel console loglevel to at least 5, for example by doing
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kernel console loglevel to at least 4 (KERN_WARNING), for example by
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doing
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echo 5 > /proc/sys/kernel/printk
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# save the old loglevel
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read LOGLEVEL DUMMY < /proc/sys/kernel/printk
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# set the loglevel so we see the progress bar.
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# if the level is higher than needed, we leave it alone.
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if [ $LOGLEVEL -lt 5 ]; then
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echo 5 > /proc/sys/kernel/printk
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fi
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IMG_SZ=0
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read IMG_SZ < /sys/power/image_size
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echo -n disk > /sys/power/state
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RET=$?
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#
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# the logic here is:
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# if image_size > 0 (without kernel support, IMG_SZ will be zero),
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# then try again with image_size set to zero.
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if [ $RET -ne 0 -a $IMG_SZ -ne 0 ]; then # try again with minimal image size
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echo 0 > /sys/power/image_size
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echo -n disk > /sys/power/state
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RET=$?
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fi
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# restore previous loglevel
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echo $LOGLEVEL > /proc/sys/kernel/printk
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exit $RET
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Q: Is this true that if I have a mounted filesystem on a USB device and
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I suspend to disk, I can lose data unless the filesystem has been mounted
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@ -380,3 +405,17 @@ safest thing is to unmount all filesystems on removable media (such USB,
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Firewire, CompactFlash, MMC, external SATA, or even IDE hotplug bays)
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before suspending; then remount them after resuming.
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Q: I upgraded the kernel from 2.6.15 to 2.6.16. Both kernels were
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compiled with the similar configuration files. Anyway I found that
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suspend to disk (and resume) is much slower on 2.6.16 compared to
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2.6.15. Any idea for why that might happen or how can I speed it up?
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A: This is because the size of the suspend image is now greater than
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for 2.6.15 (by saving more data we can get more responsive system
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after resume).
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There's the /sys/power/image_size knob that controls the size of the
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image. If you set it to 0 (eg. by echo 0 > /sys/power/image_size as
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root), the 2.6.15 behavior should be restored. If it is still too
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slow, take a look at suspend.sf.net -- userland suspend is faster and
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supports LZF compression to speed it up further.
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@ -90,6 +90,7 @@ Table of known working notebooks:
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Model hack (or "how to do it")
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------------------------------------------------------------------------------
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Acer Aspire 1406LC ole's late BIOS init (7), turn off DRI
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Acer TM 230 s3_bios (2)
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Acer TM 242FX vbetool (6)
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Acer TM C110 video_post (8)
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Acer TM C300 vga=normal (only suspend on console, not in X), vbetool (6) or video_post (8)
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@ -115,6 +116,7 @@ Dell D610 vga=normal and X (possibly vbestate (6) too, but not tested)
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Dell Inspiron 4000 ??? (*)
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Dell Inspiron 500m ??? (*)
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Dell Inspiron 510m ???
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Dell Inspiron 5150 vbetool needed (6)
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Dell Inspiron 600m ??? (*)
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Dell Inspiron 8200 ??? (*)
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Dell Inspiron 8500 ??? (*)
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@ -125,6 +127,7 @@ HP NX7000 ??? (*)
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HP Pavilion ZD7000 vbetool post needed, need open-source nv driver for X
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HP Omnibook XE3 athlon version none (1)
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HP Omnibook XE3GC none (1), video is S3 Savage/IX-MV
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HP Omnibook XE3L-GF vbetool (6)
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HP Omnibook 5150 none (1), (S1 also works OK)
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IBM TP T20, model 2647-44G none (1), video is S3 Inc. 86C270-294 Savage/IX-MV, vesafb gets "interesting" but X work.
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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 :-(]
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@ -157,6 +160,7 @@ Sony Vaio vgn-s260 X or boot-radeon can init it (5)
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Sony Vaio vgn-S580BH vga=normal, but suspend from X. Console will be blank unless you return to X.
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Sony Vaio vgn-FS115B s3_bios (2),s3_mode (4)
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Toshiba Libretto L5 none (1)
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Toshiba Libretto 100CT/110CT vbetool (6)
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Toshiba Portege 3020CT s3_mode (3)
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Toshiba Satellite 4030CDT s3_mode (3) (S1 also works OK)
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Toshiba Satellite 4080XCDT s3_mode (3) (S1 also works OK)
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