I tried to boot with acpi_backlight=vendor which didn't help; now there
aren'd any backlights registered in /sys/class/backlight at all.
This is an HP ProBook 6560b as well:
$ lspci -v
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family
DRAM Controller (rev 09)
Subsystem: Hewlett-Packard Company Device 1619
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core
Processor Family PCI Express Root Port (rev 09) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 00002000-00002fff
Memory behind bridge: d0300000-d03fffff
Prefetchable memory behind bridge: 00000000c0000000-00000000cfffffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series
Chipset Family MEI Controller #1 (rev 04)
Subsystem: Hewlett-Packard Company Device 1619
Flags: bus master, fast devsel, latency 0, IRQ 48
Memory at d0424000 (64-bit, non-prefetchable) [size=16]
Capabilities: <access denied>
Kernel driver in use: mei
Kernel modules: mei
00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network
Connection (rev 04)
Subsystem: Hewlett-Packard Company Device 1619
Flags: bus master, fast devsel, latency 0, IRQ 46
Memory at d0400000 (32-bit, non-prefetchable) [size=128K]
Memory at d042a000 (32-bit, non-prefetchable) [size=4K]
I/O ports at 3020 [size=32]
Capabilities: <access denied>
Kernel driver in use: e1000e
Kernel modules: e1000e
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family
USB Enhanced Host Controller #2 (rev 04) (prog-if 20 [EHCI])
Subsystem: Hewlett-Packard Company Device 1619
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at d0429000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci_hcd
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family
High Definition Audio Controller (rev 04)
Subsystem: Hewlett-Packard Company Device 1619
Flags: bus master, fast devsel, latency 0, IRQ 49
Memory at d0420000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd-hda-intel
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI
Express Root Port 1 (rev b4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
Memory behind bridge: d0200000-d02fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI
Express Root Port 3 (rev b4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
Memory behind bridge: d0100000-d01fffff
Prefetchable memory behind bridge: 00000000d0600000-00000000d06fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI
Express Root Port 4 (rev b4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
Memory behind bridge: d0000000-d00fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family
USB Enhanced Host Controller #1 (rev 04) (prog-if 20 [EHCI])
Subsystem: Hewlett-Packard Company Device 1619
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at d0428000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci_hcd
00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC
Controller (rev 04)
Subsystem: Hewlett-Packard Company Device 1619
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>
Kernel modules: iTCO_wdt
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family
6 port SATA AHCI Controller (rev 04) (prog-if 01 [AHCI 1.0])
Subsystem: Hewlett-Packard Company Device 1619
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 45
I/O ports at 3048 [size=8]
I/O ports at 3054 [size=4]
I/O ports at 3040 [size=8]
I/O ports at 3050 [size=4]
I/O ports at 3000 [size=32]
Memory at d0427000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ahci
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Seymour
[Radeon HD 6400M Series] (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company Device 161b
Flags: bus master, fast devsel, latency 0, IRQ 47
Memory at c0000000 (64-bit, prefetchable) [size=256M]
Memory at d0300000 (64-bit, non-prefetchable) [size=128K]
I/O ports at 2000 [size=256]
Expansion ROM at d0340000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: radeon
Kernel modules: radeon
01:00.1 Audio device: Advanced Micro Devices [AMD] nee ATI Caicos HDMI Audio
[Radeon HD 6400 Series]
Subsystem: Hewlett-Packard Company Device 161b
Flags: bus master, fast devsel, latency 0, IRQ 50
Memory at d0320000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd-hda-intel
03:00.0 System peripheral: JMicron Technology Corp. SD/MMC Host Controller (rev
30)
Subsystem: Hewlett-Packard Company Device 1619
Flags: bus master, fast devsel, latency 0, IRQ 18
Memory at d0104000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at d0600000 [disabled] [size=64K]
Capabilities: <access denied>
Kernel driver in use: sdhci-pci
Kernel modules: sdhci-pci
03:00.2 SD Host controller: JMicron Technology Corp. Standard SD Host
Controller (rev 30) (prog-if 01)
Subsystem: Hewlett-Packard Company Device 1619
Flags: fast devsel, IRQ 18
Memory at d0103000 (32-bit, non-prefetchable) [size=256]
Capabilities: <access denied>
Kernel modules: sdhci-pci
04:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless
LAN Controller (rev 01)
Subsystem: Hewlett-Packard Company Device 145c
Flags: bus master, fast devsel, latency 0, IRQ 19
Memory at d0000000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: brcmsmac
Kernel modules: bcma, brcmsmac
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https://bugs.launchpad.net/bugs/990326
Title:
Screen brightness setting has no affect on HP ProBook 6560b
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