| Summary: | Dell XPS 13 L322X (Sputnik, FullHD) backlight is off | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Rolle <rolle.hoffmann> |
| Component: | xorg-x11-drv-intel | Assignee: | Adam Jackson <ajax> |
| Status: | CLOSED INSUFFICIENT_DATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 20 | CC: | ajax, hdegoede, ja, massi.ergosum, rolle.hoffmann, xgl-maint |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2014-06-11 14:15:16 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: | |
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Description
Rolle
2013-11-08 10:37:58 UTC
the following commands are without success: xbacklight echo -n 0 > /sys/module/video/parameters/brightness_switch_enabled /sys/class/backlight/intel_backlight/brightness /sys/class/backlight/acpi_video0/brightness The slider of the gnome brightness control is very choppy. So maybe it tries to set something, that require some time. I have the same problem, with the same laptop I think #903136 is related, looks like 3.12 fix the problems Hi, I've been researching backlight issues for the last few days and I think I'm starting to get a handle on them, or at least to some degree. Can you install with the latest fedora kernel: http://koji.fedoraproject.org/koji/buildinfo?buildID=513888 (download the rpm for your arch, and install it with "rpm -ivh kernel...rpm") ? And boot it with "video.use_native_backlight=1" on the kernel cmdline (press esc at the grub screen to stop grub from booting, then e to edit the entry for the latest kernel, then go the line starting with linux, and add the end of that line add a space and then ideo.use_native_backlight=1), then press F10 to boot. Once booted check if the brightness control now works properly, also please run the following 2 commands: grep '.*' /sys/class/dmi/id/*_* 2> /dev/null ls /sys/class/backlight And copy and paste the output here. Thanks, Hans Hi, I've just learned that this should be fixed in 3.15-rc3 and later, see: https://bugs.freedesktop.org/show_bug.cgi?id=76276 Can you please try installing this kernel: http://koji.fedoraproject.org/koji/buildinfo?buildID=513881 And see if that fixes things ? Thanks, Hans So as mentioned in comment 5, I'm pretty sure that this is: https://bugs.freedesktop.org/show_bug.cgi?id=76276 Which has a patch attached for 3.14 stable too, perhaps we should at that patch to the Fedora kernels until it trickles down through stable ? I don't have access to this Dell Laptop at this time. This Laptop is owned by a friend and he removed Ubuntu and Fedora and only Win 8 is installed :-( So a new Fedora install is at the moment impossable. With a live system (USB stick) it seems not possible to try this? I had to boot a live system, install the patch and then I must reboot. But the reboot is impossable with a live system :-( Hi Rolle, (In reply to Rolle from comment #7) > I don't have access to this Dell Laptop at this time. This Laptop is owned > by a friend and he removed Ubuntu and Fedora and only Win 8 is installed :-( > So a new Fedora install is at the moment impossable. > With a live system (USB stick) it seems not possible to try this? I had to > boot a live system, install the patch and then I must reboot. But the reboot > is impossable with a live system :-( No problem, there was a known bug with XPS machines backlight which has been fixed upstream and in the Fedora kernels for a while now. I'm pretty sure that this is fixed now, so lets just close this bug. Thanks for your support / help with solving this! Regards, Hans |