** Description changed: Device: notebook Dell Inspiron 5548 Operating system: 64-bit XUbuntu Linux 14.04 LTS Processor: Intel Core i7-5500U Kernel: 3.19.0-33-generic #38~14.04.1-Ubuntu SMP x86_64 Video: dual chip. These are the two display controllers: - Advanced Micro Devices, Inc. [AMD/ATI] Topaz XT [Radeon R7 M260] display controller 33000000Hz (requires kernel module / device driver "fglrx"); and - Intel Corporation Broadwell-U Integrated Graphics VGA compatible controller 33000000Hz (requires kernel module / device driver "i915"). Problem: my notebook's operating system is switching to runlevel 0 (power off) randomly, subtly and thus unexpectedly. And if I 'cat /var/log/kern.log |grep -i i915' I get a lot of "[drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)!" messages. I'm under the impression that either the kernel or the kernel module "i915_bpo" is buggy. My notebook's problem can't be related to overheating, because it's a - brand-new notebook (~1 week old) and I've already monitored its - temperature parameters: nothing abnormal is happening. Also, I'm using a - cooling laptop base/pad. + brand-new notebook (less than 1 month old) and I've already monitored + its temperature parameters: nothing abnormal is happening. Also, I'm + using a cooling laptop base/pad. Other kernels I've tested, with which the same issue happens: - 3.19.0-18-generic (kernel module: i915_bpo) - 3.19.0-23-generic (kernel module: i915_bpo) - 3.19.0-28-generic (kernel module: i915_bpo) - 4.2.0-18-generic (kernel module: i915) Temporary workaround: I downgraded to kernel "3.13.0-36-generic", which isn't buggy with its "i915_bdw.ko" (version 3.0) kernel object (module). Full path for this module: /lib/modules/3.13.0-36-generic/kernel/ubuntu/i915/i915_bdw.ko - Notes: - "bdw" stands for "Broadwell" - "bpo", I believe, stands for "backport" ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.19.0-33-generic 3.19.0-33.38~14.04.1 ProcVersionSignature: Ubuntu 3.19.0-33.38~14.04.1-generic 3.19.8-ckt7 Uname: Linux 3.19.0-33-generic x86_64 NonfreeKernelModules: wl fglrx ApportVersion: 2.14.1-0ubuntu3.19 Architecture: amd64 CurrentDesktop: XFCE Date: Wed Nov 25 23:44:39 2015 InstallationDate: Installed on 2015-11-03 (22 days ago) InstallationMedia: Xubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) SourcePackage: linux-lts-vivid UpgradeStatus: No upgrade log present (probably fresh install)
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520040 Title: [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-vivid/+bug/1520040/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
