Comment 6 for bug 1114856
Revision history for this message
| Val (vk1266) wrote Re: power button not working when Samsung laptop is booted in CSM mode; works fine in EFI mode | #6 |
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7020100
(Get the code!)
Allright, the 3.8 mainline kernels for Quantal are probably not going to appear in the Mainline Builds ppa any time soon. I took some time today to try and install Raring AMD64 from daily builds on my Samsung NP700Z5C and see if the problem with the power button is still there.
It is important to mention that all of the following concerns booting into the CSM mode (the BIOS compatibility mode).
The results are quite surprising to me. Once I booted into the Raring LiveCD (13.04 kernel version 3.8.0-10-generic), I noticed that the power button worked just fine. I proceeded with the installation that completed without a hitch and booted into the newly installed 13.04. Again, no problem with the power button.
Then I booted into the Quantal Live CD (12.10 kernel version 3.5.0-17-generic). The power button worked just fine! But when I rebooted into the Quantal installation (12.10 kernel version 3.5.0-25-generic), the power button stopped working. According to /lib/udev/keymap, it sends no scancodes.
Bottom line:
Quantal LiveCD: power button works
Quantal installation: power button does not work
Raring LiveCD: power button works
Raring installation: power button works
Why can this be happening? What configs should I compare between LiveCD and the installation? What should I look for in dmesg?