In case somebody would debug this problem again, here is answer to my question from Jean-Louis back in 2015:
AT Translated Set 2 keyboard reports these events: left button: EV_MSC MSC_SCAN 219 EV_KEY KEY_LEFTMETA (0x7d) pressed EV_SYN code=0 value=0 EV_MSC MSC_SCAN 45 EV_KEY KEY_X (0x2d) pressed EV_SYN code=0 value=0 EV_MSC MSC_SCAN 45 EV_KEY KEY_X (0x2d) released EV_SYN code=0 value=0 EV_MSC MSC_SCAN 219 EV_KEY KEY_LEFTMETA (0x7d) released EV_SYN code=0 value=0 middle button: EV_MSC MSC_SCAN 133 EV_KEY KEY_BRIGHTNESSDOWN (0xe0) pressed EV_SYN code=0 value=0 EV_MSC MSC_SCAN 133 EV_KEY KEY_BRIGHTNESSDOWN (0xe0) released EV_SYN code=0 value=0 right button: EV_MSC MSC_SCAN 132 EV_KEY KEY_NEXTSONG (0xa3) pressed EV_SYN code=0 value=0 EV_MSC MSC_SCAN 132 EV_KEY KEY_NEXTSONG (0xa3) released EV_SYN code=0 value=0 So left button generates combination META+X, middle button is reported as brightness down and right button as next song. So keys are reported via PS/2 keyboard and also by WMI. Dell WMI events are ignored by kernel to prevent duplication. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/815914 Title: dell_wmi: Unknown key eXXX pressed Status in Linux: Fix Released Status in linux package in Ubuntu: Fix Released Status in linux source package in Oneiric: Fix Released Bug description: I got a new Dell XPS 15 laptop (L502X). Now when i'm changing the volume with the hotkeys, dmesg throws me the following errors: [16971.294903] dell_wmi: Unknown key e0f8 pressed [16985.978025] dell_wmi: Unknown key e0f7 pressed [16986.731775] dell_wmi: Unknown key e0f9 pressed The keys actually work, but the WMI doesn't seem to be supported yet. Is there any chance to fix this? If you need additional information, feel free to ask! To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/815914/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
