Bug 28942
| Summary: | no more brightness control on Fujitsu-Siemens SI 2636 laptop with 2.6.38-RC4 kernel | ||
|---|---|---|---|
| Product: | ACPI | Reporter: | Tasev Nikola (tasev.stefanoska) |
| Component: | Power-Video | Assignee: | acpi_power-video |
| Status: | CLOSED DUPLICATE | ||
| Severity: | normal | CC: | lenb, rjw |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.38-RC4 | Subsystem: | |
| Regression: | Yes | Bisected commit-id: | |
| Attachments: |
dmidecode Fujitsu-Siemens SI2636
dmesg 2.6.38-rc4 lspci -vvv scripts/ver_linux Fujitsu-Siemens SI2636 dsdt.dsl |
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Created attachment 47522 [details]
dmesg 2.6.38-rc4
Created attachment 47532 [details]
lspci -vvv
Created attachment 47542 [details]
scripts/ver_linux
Created attachment 47552 [details]
Fujitsu-Siemens SI2636 dsdt.dsl
Does the patch from bug #27702 help? Yes ! The patch is perfect. The keys for brightness control works again. Thank you. |
Created attachment 47512 [details] dmidecode Fujitsu-Siemens SI2636 Hello devs, First thank you for your great work on linux an make all this possible. After compiling a 2.6.38-RC4 kernel i found that the brightness control off my laptop Fujitsu-Siemens SI 2636 don't work anymore. The brightness control work with the fn+F8 an fn+F9 keys with all previous version off the kernel i tried from 2.6.24 to 2.6.37 . My system is Kubuntu 10.04 LTS with the kernel mode-settings and the intel video driver. In the dmesg output off the 2.6.37 kernel i found 2 related lines : [Firmware Bug]: ACPI: No _BQC method, cannot determine initial brightness [drm:intel_panel_get_max_backlight] *ERROR* fixme: max PWM is zero. But even with those errors the brightness control work fine with the 2.6.37 kernel. When using the 2.6.38-RC4 kernel i found that the directory /sys/class/backlight is empty. Attached is dmidecode. If you need more info just tell me Tasev Nikola