On Mon, 2007-04-16 at 23:34 -0400, Dave Jones wrote: > On Mon, Apr 16, 2007 at 10:26:43AM +0100, Richard Purdie wrote: > > > > > > > CONFIG_FB_BACKLIGHT=y > > > > > > CONFIG_ACPI_VIDEO=n > > > > > > > > > > That also gets me a dead display. Backlight doesn't turn back on. > > > > > > > > Anything under /sys/class/backlight? > > > > > > Entries from ibm_acpi. I rmmod'd that, leaving the dir empty, > > > and it still fails. > > > > What happens if you never load ibm-acpi? > > Same thing. No backlight on resume. > I rm'd the .ko, so there's no chance it got loaded. > > > I'm a bit puzzled as CONFIG_FB_BACKLIGHT doesn't do anything with the > > intelfb driver. One thing it does do is set > > CONFIG_BACKLIGHT_CLASS_DEVICE. When you disabled FB_BACKLIGHT and got a > > working display on resume, was that set and was (or had) ibm-acpi been > > loaded? > > > > A variety of other options such as ACPI_IBM also set > > CONFIG_BACKLIGHT_CLASS_DEVICE although without a backlight driver it > > will do nothing hence the suspicion is on ibm-acpi, perhaps interacting > > with the backlight class badly. > > > > Does echoing numbers to /sys/class/backlight/ibm_acpi/brightness change > > the backlight brightness as expected? > > /sys/class/backlight/ibm/brightness takes a value from 0 to 7. > Starts off with a default of 0. I tried all values in there, and > it made no visible difference. But as the no-backlight thing happens > without this even loaded, I think this is a separate problem. > > > If you can ssh into the machine > > after its resumed with the display problem, it would be interesting to > > know what the brightness was and if changing it helped too... > > When the backlight doesn't come on, for some reason, nothing else > runs. Capslock works, so it's at least partially alive, but even > doing.. > > echo mem > /sys/power/state ; echo foo >/bar ; sync > > results in no /bar being created. > Ethernet remains down when its in this state too.
Have you tried these boot options? acpi_sleep=s3_mode; or acpi_sleep=s3_bios,s3_mode Tony - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
