Acer TM (TravelMate) B115M N2930 processor (manufactured on Jully-2014) Acer TM (TravelMate) B115M N2940 processor (manufactured on Jully-2015) Acer TM (TravelMate) B117M N3150 processor using SSD (manufactured on Jully-2016)
Lubuntu 14.04 LTS + LTSEnablementStack (https://wiki.ubuntu.com/Kernel/LTSEnablementStack) We have about 110 units of each model. Some of them are freezing. Tested 2 machines of each model during more than 72 hours. Playing Youtube videos with Chrome at full screen, playing with MineCraft (Java application), using the webcam with guvcview, running powertop, pinging our gateway, showing iwevent... Kernel version 4.4.0-36-generic 64bit Using c6off+c7on.sh (see comment #139) seems to solve the problem. However, N3150 is seen has CHT (Cherry Trail) processor, not BYT (Bay Trail) processor. So, for this case it's necessary to modify c6off+c7on.sh for cases C6*-CHT and C7*-CHT. cstateInfo.sh (see comment #139) shows all the state-names, if doubts about it. N2930, N2940 --> Bay Trail Processors (http://ark.intel.com/products/codename/55844/Bay-Trail?q=bay%20trail#@All) N3150 --> Braswell Processor (http://ark.intel.com/products/codename/66094/Braswell#@All) But kernel code sees as Cherry Trail Processor (???) (http://ark.intel.com/products/codename/46629/Cherry-Trail) Upgraded the machines to latest stable kernel (4.8.10). No script applied. It also seems to solve the problem. Solution found at https://forum.manjaro.org/t/intel-bay-trail-freezes-the-linux- kernel/1931/12 For B117M, Acer technical services changed the SSD unit. But the system continued freezing. At comment #126 one user solved his problem updating the SSD firmware. Our 2 tested B117M seem to be stable with 4.8.10 kernel. ** Attachment added: "kernel 4.8.10 generic 64 bit" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1575467/+attachment/4781556/+files/kernel_v4.8.10.sh -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1575467 Title: [Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts- utopic-vy2yyy/linux-lts- utopic-3.16.0/drivers/gpu/drm/i915/intel_display.c:1743 vlv_wait_port_ready+0x126/0x170 [i915]() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1575467/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
