Bug 60796

Summary:	black screen when close laptop lid on kernel 3.10.9 and 3.11-rc7
Product:	Drivers	Reporter:	Rafael (darkdrael)
Component:	Video(DRI - Intel)	Assignee:	Daniel Vetter (daniel)
Status:	RESOLVED INSUFFICIENT_DATA
Severity:	normal	CC:	alan, daniel, intel-gfx-bugs
Priority:	P3
Hardware:	x86-64
OS:	Linux
Kernel Version:	3.11	Subsystem:
Regression:	No	Bisected commit-id:

Description Rafael 2013-08-26 16:22:25 UTC

On a acer aspire laptop (5741z) running ubuntu 12.04 with kernel 3.10.9 and kernel 3.11-rc7 with a intel HD VGA using the driver i915, I get a total black screen when close the laptop lid and reopen the lid.

When Laptop lid is close the file /sys/class/backlight/intel_backlight/brightness get a '0' value but when the lid is reopen that file don't get back the value from /sys/class/backlight/intel_backlight/actual_brightness or /sys/class/backlight/intel_backlight/max_brightness resulting on a total black screen.

I been able to restore the brightness of the screen using the fn key on my laptop after reopen the laptop lid, so this way the value of /sys/class/backlight/intel_backlight/actual_brightness was increasing, but I have to do this everytime I close the lid.

The fn + keys only works when I add the value: 'acpi_backlight=vendor' on grub boot command line.

lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)

Comment 1 Daniel Vetter 2013-11-13 22:25:05 UTC

Is this a regression?

Please retest on latest kernels, there's been tons of fun recently with the acpi backlight code.

Comment 2 Jani Nikula 2014-08-14 11:31:49 UTC

Timeout. Please reopen if the problem persists with recent kernels.