[Bug 58151] New: kernel 3.2.45 regression in i915 driver for 00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=58151

           Summary: kernel 3.2.45 regression in i915 driver for 00:02.0
                    VGA compatible controller: Intel Corporation Mobile 4
                    Series Chipset Integrated Graphics Controller (rev 07)
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.2.45
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - Intel)
        AssignedTo: intel-gfx-bugs at lists.freedesktop.org
        ReportedBy: nix.sasl at gmail.com
                CC: intel-gfx-bugs at lists.freedesktop.org,
                    nix.sasl at gmail.com
        Regression: Yes


Using the same .config file on the same machine (Lenovo Thinkpad t400),
compiling 3.2.44 kernel no problem, compiling 3.2.45 no backlight and no video.
Disabling the modeseting by default on the .config and setting i915.modeset=0
the backlight works, but, no framebuffer, and no control of backlight using Fn
+ Bright up/down.

OS base: CentOS 6.4 i686, custom kernel vanilla from kernel.org, SELinux
disabled, up to date.
Hardware: Lenovo Thinkpad T400


Using 3.4.45 no problem, and 3.4.44, the bug is in 3.2.45.


00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset
Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset
Integrated Graphics Controller (rev 07)

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