[Bug 70256] New: [i915] invert_brightness on "8086:0116:103c:1854" is required

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70256

          Priority: medium
            Bug ID: 70256
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [i915] invert_brightness on "8086:0116:103c:1854" is
                    required
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: tkhai at yandex.ru
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Hi,

I execute kernel v3.11 on HP 250 G1 notebook. There is strange behaviour. Two
cases:

1)No parameters are passed to i915.

Screen is black: since grub is finished till X server is started. Brightness is
0, but it's possible to increase it by Fn keyboard keys.

In the process of powerdown everything is OK: I see all nice sysvinit messages.

2)Parameter invert_brigntness=1 is passed.

In the process of boot everything is OK: I see start messages of sysvinit
services.

Going to powerdown is complitely black, but Fn keys light screen fires.

 lspci is:
 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA
controller])
         Subsystem: Hewlett-Packard Company Device 1854
         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
         Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
         Latency: 0
         Interrupt: pin A routed to IRQ 42
         Region 0: Memory at c2000000 (64-bit, non-prefetchable) [size=4M]
         Region 2: Memory at b0000000 (64-bit, prefetchable) [size=256M]
         Region 4: I/O ports at 4000 [size=64]
         Expansion ROM at <unassigned> [disabled]
         Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
                 Address: fee0f00c  Data: 41b1
         Capabilities: [d0] Power Management version 2
                 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                 Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
         Capabilities: [a4] PCI Advanced Features
                 AFCap: TP+ FLR+
                 AFCtrl: FLR-
                 AFStatus: TP-
         Kernel driver in use: i915

Here is short discussion with Jani Nikula and Daniel Vetter:
http://lists.freedesktop.org/archives/intel-gfx/2013-October/034341.html

Regards,
Kirill

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