"Paulo J. S. Silva" <[EMAIL PROTECTED]> writes: > I have found the problematic module that don't allow suspend to ram to > work in the Toshiba U205 S5067 laptop: it is the sata driver. This > laptop has as an Intel ICH7 Family SATA controller that uses the libsata > + ata_piix module. > > I had a hint that the SATA module could be the problem after ROSS told > us that the LFDK CD kernel could suspend to RAM. I confirmed this now > after recompiling my distribution kernel (Ubuntu Feisty Fawn, based on > kernel 2.6.20) and making the following changes to the kernel > configuration (in menuconfig): > > 1) Compile the following options as builtin (not as module): > > Device Drivers -> ATA/ATAPI/MFM/RLL Support -> Include IDE/ATA-2 DISK > support > Device Drivers -> ATA/ATAPI/MFM/RLL Support -> genric IDE chipset > support > > (This is necessary to allow the laptop to access the HD without the SATA > driver. Note that the HD works without DMA and hence it is very, very > slow, so this is not a real workaround, it is only a way to do the test. > Note that with this driver the hd will appear as /dev/hda (and not > as /dev/sda). This may make necessary some changes in the GRUB boot > options. In Ubuntu no changes to grub are necessary) > > 2) Turn off (exclude) the ata_piix module: > > Device Drivers -> Serial ATA (prod) and Parallel ATA (experimental) > drivers -> Intel ESB, ICH, PIIX3, PIIX4 PATA/SATA support > > After these changes I have recompiled the kernel and rebooted onto the > new compiled version. > > The laptop is slow due to the DMA-less HD, but I am able to suspend to > ram and come back just in LFDK CD. > > I will update the bug reports with this information. I may try to debug > the driver adding printk to it but I am afraid that the console will go > blank before I can see any messages.
Some google searching reveals that the ata_piix module and sata in general have had a number of problems with suspend. I wonder if there's anyone more specifically involved with those areas of the kernel who might be interested in this problem? Ross ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Suspend-devel mailing list Suspend-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/suspend-devel
