Bug 15301
| Summary: | display switch hotkey does not work anymore | ||
|---|---|---|---|
| Product: | ACPI | Reporter: | Denis Laxalde (denis) |
| Component: | Power-Video | Assignee: | Zhang Rui (rui.zhang) |
| Status: | REJECTED INVALID | ||
| Severity: | normal | CC: | acpi-bugzilla, rui.zhang |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.32.8 | Subsystem: | |
| Regression: | Yes | Bisected commit-id: | |
| Attachments: | acpidump of Dell D620 | ||
using acpi_listen, can you receive any ACPI events when pressing the hotkey? If no, can you receive any events in 2.6.26? With 2.6.32, acpi_listen returns: video/switchmode VMOD 00000080 00000000 video/switchmode VMOD 00000080 00000000 I cannot test with 2.6.26 anymore (ext4). please attach the acpidump output of your laptop. Created attachment 25170 [details]
acpidump of Dell D620
comment #2 says that the ACPI part of video switching is working -- we deliver the event. ACPI is not responsible for actually switching displays. So it seems that this is an issue with the X server and/or native (nvidia) device driver). (In reply to comment #5) > So it seems that this is an issue with the X server > and/or native (nvidia) device driver). That's also what the Debian maintainer thinks... (In reply to comment #2) > With 2.6.32, acpi_listen returns: > video/switchmode VMOD 00000080 00000000 > video/switchmode VMOD 00000080 00000000 > this is weird, I can not find the VMOD device in the acpidump you attached. will you please make a double check that the laptop you get the acpidump output from is the one that you run the test on? please run "lsof /proc/acpi/event" and kill all the processes that reading this file, and then run "cat /proc/acpi/event", please attach the output when pressing the hotkeys. (In reply to comment #7) > will you please make a double check that the laptop you get the acpidump > output > from is the one that you run the test on? There's no doubt, I only have one laptop. > please run "lsof /proc/acpi/event" and kill all the processes that reading > this > file, and then run "cat /proc/acpi/event", > please attach the output when pressing the hotkeys. Sorry, this event file does not exist on my system... please set both CONFIG_ACPI_PROCFS and CONFIG_ACPI_PROC_EVENT in the kernel config, and rebuild your kernel. does the problem still exist? If yes, please do the test in comment #7. Ok (sorry for the late reply), rebuilding the kernel with CONFIG_ACPI_PROC_EVENT solved the problem. I guess it is actually nvidia's fault and they'll have to adapt to the new way of catching acpi events... |
Bug originally reported in the Debian BTS: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=540711 Display switch hotkey Fn+F8 stopped working. It worked with 2.6.26 but not with 2.6.29 or higher (not tested with versions in between). Hardware: Dell Latitude D620, nvidia graphic card GeForce Go 7300 Current system: - Kernel: 2.6.32.8 (Debian package) - nvidia-graphics-drivers 190.53