Red Hat Bugzilla – Full Text Bug Listing
|Summary:||kernel-2.6.35 no longer creates /proc/acpi/event, which breaks sony_laptop|
|Product:||[Fedora] Fedora||Reporter:||Rohan Dhruva <rohandhruva>|
|Component:||kernel||Assignee:||John Feeney <jfeeney>|
|Status:||CLOSED CURRENTRELEASE||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Version:||14||CC:||dougsland, gansalmon, itamar, jfeeney, jonathan, kernel-maint, madhu.chinakonda|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2011-03-14 03:48:48 EDT||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Rohan Dhruva 2010-10-22 23:04:57 EDT
Description of problem: Kernel 2.6.35 in F14 has disabled CONFIG_ACPI_PROC_EVENT. I have a Sony Vaio CW laptop, which relies on the sony_laptop kernel module to catch acpi hotkey events. Thus, in Fedora 14, pressing Fn+F5 (brightness down) is not recognized at all, and pressing Fn+F6 is recognized as a generic button, having no effect on brightness. I use the nvidia_bl driver, and oBacklight to control the brightness. Version-Release number of selected component (if applicable): kernel-18.104.22.168-45.fc14.x86_64 How reproducible: Always Steps to Reproduce: 1. Start acpi_listen 2. Press the brightness up key (Fn+F5) 3. Press the brightness down key (Fn+F6) Actual results: Brightness down registers no event. Brightness up gives "button/fnf6 FNF6 00000080 00000000" Expected results: Fn+F5 should give- sony/hotkey SNC 00000001 00000010 Fn+F6 should give- sony/hotkey SNC 00000001 00000011 Additional info: I realize that CONFIG_ACPI_PROC_EVENT is deprecated, but this causes a major loss of functionality for all Sony laptops relying on it. I am quite sure this problem affects other Sony laptops too, not only Vaio CW. I request that CONFIG_ACPI_PROC_EVENT is enabled, at least until an alternative is found.
Comment 1 Matthew Garrett 2010-11-03 10:47:31 EDT
Brightness events should be generating KEY_BRIGHTNESSUP and KEY_BRIGHTNESSDOWN - is that not happening?
Comment 2 Rohan Dhruva 2010-11-03 10:50:45 EDT
No, they are not generating those events (can't see in xev). On enabling CONFIG_ACPI_PROC_EVENT (by recompiling the kernel), at least acpi_listen generates correct output. But xev never shows KEY_BRIGHTNESSUP or KEY_BRIGHTNESSDOWN, in either case.
Comment 3 Matthew Garrett 2010-11-03 11:10:04 EDT
You won't see them in xev if you have a power manager that's taken a grab. Can you install evtest and run it against the Sony Vaio keys device and see whether they appear there?
Comment 4 Rohan Dhruva 2010-11-03 11:24:17 EDT
evtest does show that key events are caught. I had a talk with the maintainer of this module (Mattia Dongili). He told that the problem may be occurring because X protocol can't handle keys with scancodes > 255 (http://bugs.freedesktop.org/show_bug.cgi?id=11227). Is there any way I can key scancode 470 and 471 to KEY_BRIGHTNESSDOWN and KEY_BRIGHTNESSUP respectively? I am attaching the output of evtest (event8 is the Sony Vaio Keys event handler).
Comment 6 Matthew Garrett 2010-11-03 11:33:18 EDT
Ah, in that case we just need to fix up the keymap. I'll look into that, thanks!
Comment 7 Rohan Dhruva 2010-11-12 16:28:01 EST
Hello.. Any updates on this? Will this be fixed for Fedora 14? Thanks.
Comment 8 Rohan Dhruva 2011-01-10 00:45:30 EST
Comment 9 Rohan Dhruva 2011-03-14 03:48:48 EDT
I can confirm that brightness control keys work for me on the Fedora 15 alpha release.