Bug 29882
Summary: | LCD backlight brightness too low to be useable, though changeable | ||
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Product: | ACPI | Reporter: | Niklas Schnelle (niklas) |
Component: | Power-Video | Assignee: | acpi_power-video |
Status: | CLOSED INSUFFICIENT_DATA | ||
Severity: | high | CC: | lenb, niklas, rui.zhang |
Priority: | P1 | ||
Hardware: | All | ||
OS: | Linux | ||
URL: | rui.zhang@intel.com | ||
Kernel Version: | 2.6.38-rc6 | Subsystem: | |
Regression: | Yes | Bisected commit-id: |
Description
Niklas Schnelle
2011-02-25 09:01:43 UTC
please attach the working .config for 2.6.37 and the failing .config for 2.6.38. One area of interest would be anything related to KMS. My guess is that the backlight is actually OFF, and that you may be seeing brightness applied to the faint ambient glow that some screens have. also, please try this parameter video.use_bios_initial_backlight=0 and report if it makes any difference. Bug closed as there is no response from the bug reporter. Please feel free to reopen it if the problem still exists in the latest upstream kernel, with and without the suggestion in comment #2. |