Laptop brightness not preserved

Bug #1588304 reported by datenteiler on 2016-06-02
22
This bug affects 4 people
Affects Status Importance Assigned to Milestone
ubuntu-mate
Undecided
Unassigned
mate-power-manager (Ubuntu)
Undecided
Unassigned

Bug Description

I've recently installed Ubuntu MATE 16.04 on my laptop Dell Latitude D520. So far everything is working very well apart from setting the screen brightness. I was using Ubuntu 12.04 before and I could change the screen brightness.

I tried these kernel parameters: "acpi_backlight=vendor", "video.use_native_backlight=1" and "acpi_osi=Linux" but none worked.

The function keys are working, but the brightness is nut adjusting. I got a little flicker but nothing else happens. How can this be fixed or is it related to MATE Desktop. Other desktops like xfce, cinnamon etc. works as expected.

00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 2 (rev 01)
00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #1 (rev 01)
00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #2 (rev 01)
00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #3 (rev 01)
00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #4 (rev 01)
00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA Controller [IDE mode] (rev 01)
00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 01)
02:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)
02:01.0 CardBus bridge: O2 Micro, Inc. Cardbus bridge (rev 21)
02:01.4 FireWire (IEEE 1394): O2 Micro, Inc. Firewire (IEEE 1394) (rev 02)
0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)

summary: - Ubuntu MATE 16.04 laptop brightness not preserved
+ Laptop brightness not preserved
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Vlad Orlov (monsta) on 2017-11-13
affects: mate-settings-daemon (Ubuntu) → mate-power-manager (Ubuntu)
Changed in mate-power-manager (Ubuntu):
status: New → Confirmed
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