Bug 6778

Summary:	S3: resume: black screen - Toshiba M50
Product:	ACPI	Reporter:	Scott Murphy (scott)
Component:	Power-Sleep-Wake	Assignee:	acpi_aml-interpreter
Status:	REJECTED UNREPRODUCIBLE
Severity:	normal	CC:	acpi-bugzilla, dsd
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.17.1	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	Decompiled dsdt.dsl file

Description Scott Murphy 2006-06-30 03:51:20 UTC

Most recent kernel where this bug did not occur:
None

Distribution:
Ubuntu 6.06 LTS Dapper Drake

Software environment:
Gnome 2.14.2
Gnome-power-manager 2.15.4
hald-0.5.4

Problem Description:

Shuts down, power button flashes red. When I press the power button again, the
screen just goes to black and doesn't recover.

Steps to reproduce:
echo mem > /sys/power/state

Comment 1 Scott Murphy 2006-06-30 03:52:43 UTC

Created attachment 8464 [details]
Decompiled dsdt.dsl file

Comment 2 Len Brown 2006-07-01 10:19:58 UTC

It is possible that the system has resumed, but failed
to re-enable the LCD.

on resume, is the LCD backlight off (black in a dark room)?
or is it on but blank (LCD glows slightly in a dark room)?

is there any indication of life on the resume?
ie. can you ping the machine on the network, or
do you see the disk LED blink?

Comment 3 Scott Murphy 2006-07-01 11:06:43 UTC

The screen seems to be completely black. No blacklight or glow of any kind. 
There is no hard drive activity and I can't ping the machine.

The disk led blinks once for about a milisecond, but then there is nothing. The
fan doesn't power up full speed like on a normal boot either. It starts at the
normal speed.

Comment 4 Len Brown 2006-08-09 21:19:40 UTC

can you ping the machine on the network after the resume attempt?

Comment 5 Scott Murphy 2006-08-09 23:55:58 UTC

Nope, I can't ping the machine.

Comment 6 Len Brown 2007-09-06 15:04:35 UTC

Please re-open if this is still a problem in linux-2.6.22.stable or later.