| Summary: | Can't load samsung-laptop module on Samsung NP900X3C | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Rui Miguel Seabra <rms> | ||||||
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> | ||||||
| Status: | CLOSED CANTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||
| Severity: | low | Docs Contact: | |||||||
| Priority: | unspecified | ||||||||
| Version: | 20 | CC: | gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, michele, rms | ||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | x86_64 | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2014-01-02 08:16:11 UTC | Type: | Bug | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Attachments: |
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Still happens with Linux 3.12: [rms@roque f]$ sudo modprobe samsung-laptop [sudo] password for rms: modprobe: ERROR: could not insert 'samsung_laptop': No such device [rms@roque f]$ uname -a Linux roque 3.12.5-302.fc20.x86_64 #1 SMP Tue Dec 17 20:42:32 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux [rms@roque f]$ Hi Rui, the driver returns ENODEV when loaded under the following conditions: - Booted from EFI - Dmi fields not recognized Can you upload the output of dmidecode to this case please? Thanks, Michele Created attachment 844263 [details]
sudo dmidecode > demidecode.txt
I guess I'm screwed as I'm booting under EFI. Will I have to find out how to revert back to legacy BIOS or is it safer to reinstall? In any case, I have attached dmidecode's output. Hi Rui,
the reason it is disabled with EFI is the following:
commit e0094244e41c4d0c7ad69920681972fc45d8ce34
Author: Matt Fleming <matt.fleming>
Date: Thu Jan 3 09:02:37 2013 +0000
samsung-laptop: Disable on EFI hardware
It has been reported that running this driver on some Samsung laptops
with EFI can cause those machines to become bricked as detailed in the
following report,
https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557
There have also been reports of this driver causing Machine Check
Exceptions on recent EFI-enabled Samsung laptops,
https://bugzilla.kernel.org/show_bug.cgi?id=47121
So disable it if booting from EFI since this driver relies on
grovelling around in the BIOS memory map which isn't going to work.
The DMI info would match, so we can definitely confirm that it is the EFI thing.
I have no idea what's faster (reinstall vs. tweaking around) sorry
OH, ok, I see. I read about this a long while ago, I expected this would have been fixed in the meanwhile and not an issue anymore. I will reinstall with legacy boot then, thanks! |
Created attachment 840380 [details] dmesg from boot Description of problem: [rms@roque ~]$ sudo modprobe samsung-laptop modprobe: ERROR: could not insert 'samsung_laptop': No such device Version-Release number of selected component (if applicable): [rms@roque ~]$ rpm -q kernel kernel-3.11.6-301.fc20.x86_64 kernel-3.11.10-301.fc20.x86_64 [rms@roque ~]$ uname -a Linux roque 3.11.10-301.fc20.x86_64 #1 SMP Thu Dec 5 14:01:17 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux Actual results: Strange failure, what device is it looking for? Why is it not there? samsung directory is not present: [rms@roque ~]$ ls -laF /sys/devices/platform/ total 0 drwxr-xr-x. 12 root root 0 Dec 22 17:38 ./ drwxr-xr-x. 14 root root 0 Dec 22 17:38 ../ drwxr-xr-x. 3 root root 0 Dec 22 17:38 alarmtimer/ drwxr-xr-x. 4 root root 0 Dec 22 17:38 coretemp.0/ drwxr-xr-x. 3 root root 0 Dec 22 17:38 efifb.0/ drwxr-xr-x. 4 root root 0 Dec 22 17:38 Fixed MDIO bus.0/ drwxr-xr-x. 5 root root 0 Dec 22 17:38 i8042/ drwxr-xr-x. 3 root root 0 Dec 22 17:38 microcode/ drwxr-xr-x. 3 root root 0 Dec 22 17:38 pcspkr/ drwxr-xr-x. 2 root root 0 Dec 22 17:49 power/ drwxr-xr-x. 3 root root 0 Dec 22 17:38 regulatory.0/ drwxr-xr-x. 4 root root 0 Dec 22 17:38 serial8250/ -rw-r--r--. 1 root root 4096 Dec 22 17:38 uevent [rms@roque ~]$ Expected results: Loaded module, /sys/devices/platform/samsung/... available exposing access to features like controlling keyboard brightness and fan