On Wed, 2007-04-25 at 09:01 -0400, Dave Jones wrote: > On Wed, Apr 25, 2007 at 01:31:02PM +0200, Adrian Bunk wrote: > > On Wed, Apr 25, 2007 at 04:06:05AM -0700, Andrew Morton wrote: > > > On Mon, 23 Apr 2007 23:49:09 +0200 Adrian Bunk <bunk@xxxxxxxxx> wrote: > > >... > > > > Subject : ThinkPad X60: resume no longer works (PCI related?) > > > > workaround: CONFIG_FB_BACKLIGHT=n > > > > References : http://lkml.org/lkml/2007/3/13/3 > > > > Submitter : Dave Jones <davej@xxxxxxxxxx> > > > > Caused-By : PCI merge > > > > commit 78149df6d565c36675463352d0bfe0000b02b7a7 > > > > Handled-By : Eric W. Biederman <ebiederm@xxxxxxxxxxxx> > > > > Rafael J. Wysocki <rjw@xxxxxxx> > > > > Antonino A. Daplas <adaplas@xxxxxxxxx> > > > > Status : unknown > > > > > > Is this related to the problems Jeremy has been looking at? > > >... > > > > Dave and Jeremy hran into similar looking but most likely different > > problems. > > > > For Jeremy -rc7 is working fine, but for Dave it doesn't. > > I think this was due to Jeremy not having CONFIG_FB_BACKLIGHT=y in his config. This is really weird, as CONFIG_FB_BACKLIGHT just selects BACKLIGHT_CLASS and LCD_CLASS, and adds an entry (bl_curve) under /sys/class/backlight/*/. ACPI_IBM which is set (presumably) in Dave's kconfig, also selects the BACKLIGHT_CLASS. And the only possible framebuffer drivers in the thinkpad are vesafb and intelfb, none of which has a backlight driver. I'm still at a loss how this happens. Dave, can you post your config? And have you tried the following settings: FB_BACKLIGHT=y ACPI_IBM=n ACPI_VIDEO=n I'm also adding Richard Purdie to the CC list. Tony PS: I also get a blank display on resume with a Toshiba laptop. But cycling through the Fn keys brings it back. I don't know if this is a regression, I will have to try older kernels. _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
