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 <jani.nik...@intel.com> 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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1265544 Title: 8086:0a16 [UX302LG] black screen on boot 3.12.0-7 Status in The Linux Kernel: Confirmed Status in “linux” package in Ubuntu: Triaged Bug description: Same description/workaround as https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1263015 I tried both Enable CSM and non-CSM boot. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.12.0-7-generic 3.12.0-7.15 ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4 Uname: Linux 3.12.0-7-generic x86_64 ApportVersion: 2.12.7-0ubuntu3 Architecture: amd64 Date: Thu Jan 2 09:59:33 2014 HibernationDevice: RESUME=UUID=e6458b44-fdb9-4db5-8cac-40ee0bbf9cf6 InstallationDate: Installed on 2013-12-31 (1 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131231) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 03eb:8a03 Atmel Corp. Bus 001 Device 003: ID 1bcf:2987 Sunplus Innovation Technology Inc. Bus 001 Device 002: ID 8087:07dc Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: ASUSTeK COMPUTER INC. UX302LG ProcFB: 0 simple ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.12.0-7-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro recovery nomodeset RelatedPackageVersions: linux-restricted-modules-3.12.0-7-generic N/A linux-backports-modules-3.12.0-7-generic N/A linux-firmware 1.117 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/30/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: UX302LG.207 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: UX302LG dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX302LG.207:bd10/30/2013:svnASUSTeKCOMPUTERINC.:pnUX302LG:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX302LG:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: UX302LG dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1265544/+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
