Launchpad has imported 4 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=73567.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2014-01-13T18:23:05+00:00 Alberto Aguirre wrote: Created attachment 91970 Test ignoring bpp clamping I have an ASUS UX302LA laptop running Ubuntu 14.04 daily build. I've switched the kernel to the latest drm-intel-nightly from here: http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel- nightly/current/) Any sequence that turns off/on the panel (suspend/resume, modesetting) results in a blank screen. I narrowed it down to the clamping code in intel_dp.c after going through this old bug thread (see attached patch) https://bugzilla.kernel.org/show_bug.cgi?id=59841 When ignoring the clamping - no blank screen issues occur. The hack implemented in intel_dp.c: commit c6cd2ee2d59111a07cd9199564c9bdcb2d11e5cf Author: Jani Nikula <[email protected]> Date: Mon Oct 21 10:52:07 2013 +0300W drm/i915/dp: workaround BIOS eDP bpp clamping issue Is not effective on the UX302LA/LG - from logs it looks like intel_dp_get_config is never called - any idea why? Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1265544/comments/54 ------------------------------------------------------------------------ On 2014-01-13T18:23:42+00:00 Alberto Aguirre wrote: Created attachment 91971 dmesg of latest intel-drm-nightly after boot Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1265544/comments/55 ------------------------------------------------------------------------ On 2014-01-13T18:24:18+00:00 Alberto Aguirre wrote: Created attachment 91972 dmesg of latest intel-drm-nightly after boot with ignore bpp clamp patch Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1265544/comments/56 ------------------------------------------------------------------------ On 2014-01-13T19:30:08+00:00 Alberto Aguirre wrote: Created attachment 91975 ASUS ux302la opregion dump Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1265544/comments/58 ** Changed in: linux Status: Unknown => Confirmed ** Changed in: linux Importance: Unknown => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1265544 Title: 8086:0a16 [UX302LG] black screen on boot 3.12.0-7 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1265544/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
