Thanks for the ideas! Did you mean 3.16.0-67 and not -87? I tried -67 now with and without vesafb:mtrr:0. System freezes within minutes in both cases.
I also tried mainline 3.16.7-ckt26-trusty and added vesafb:mtrr:3 to this and the system does NOT seem to freeze. This bug is weird. 3.16.0-38 was the first kernel with problems and mtrr was the only change that is not included in mainline. Why are mainline kernels working and normal not...? I want to believe that setting vesafb:mtrr:3 as boot parameter is exactly the same as setting mtrr = 3 in source code. (as said here https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1434581/comments/48) No ctrl-alt-f1 or alt-ctrl-sysrq is possible when the system has frozen. Nothing works. Not even the WiFi LED from the hardware switch. I started a "find *.* /" after 3.16.0-67 boot and noticed that all disc activity stopped when system freezes. That probably tells that this is not just keyboard/mouse/graphics issue? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-lts-utopic in Ubuntu. https://bugs.launchpad.net/bugs/1561902 Title: Total system freeze after 3.16.0-38.52 Status in linux-lts-utopic package in Ubuntu: New Bug description: This should have been reported already last year, but here it goes. Problem: My laptop is a ASUS N71JA and works perfectly in Windows. Everything was fine with Xubuntu 14.04 through kernels 3.13 and 3.16 up to 3.16.0-38.52. Desktop freezes, like totally dies with hard power reset being the only option, every now and then from this kernel and onwards. This affects 3.19 and 4.2.0 kernels released after this date as well. No Magic SysRq possible and I can't see anything fancy in syslog or kern.log. Desktop can die anytime between immediately after boot or after a few hours, but it happens completely randomly and is hard to debug. Workaround: 3.16.0-38.52 was released in May 2015 (https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1452882). 3.16.0-37.51 and 3.16.0-36.48 have NEVER frozen. The only non-upstream change that was made to 3.16.0-38.52 was "vesafb: Set mtrr:3 (write-combining) as default" (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1434581). This is probably not implemented in the mainline kernel tree, right? I've been using mainline 3.16.7-ckt24-trusty without any problems now for over a month (http://kernel.ubuntu.com/~kernel- ppa/mainline/v3.16.7-ckt24-trusty/) i.e. it seems like 1434581 is causing the problem. Can this be verified by some other method e.g. by disabling/reverting 1434581 in a "normal" non-mainline kernel? Solution: ? --- ApportVersion: 2.14.1-0ubuntu3.19 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: isak 1669 F.... pulseaudio /dev/snd/controlC0: isak 1669 F.... pulseaudio /dev/snd/controlC1: isak 1669 F.... pulseaudio CurrentDesktop: XFCE DistroRelease: Ubuntu 14.04 HibernationDevice: RESUME=UUID=188824e0-028f-4004-92b9-9e627eff4d5c MachineType: ASUSTeK Computer Inc. N71Ja Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-38-generic root=UUID=1d243640-e961-4ee3-b6d9-8e4ee5816090 ro quiet splash ProcVersionSignature: Ubuntu 3.16.0-38.52~14.04.1-generic 3.16.7-ckt10 RelatedPackageVersions: linux-restricted-modules-3.16.0-38-generic N/A linux-backports-modules-3.16.0-38-generic N/A linux-firmware 1.127.20 Tags: trusty Uname: Linux 3.16.0-38-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers _MarkForUpload: True dmi.bios.date: 05/14/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: N71Ja.206 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: N71Ja 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.:bvrN71Ja.206:bd05/14/2010:svnASUSTeKComputerInc.:pnN71Ja:pvr1.0:rvnASUSTeKComputerInc.:rnN71Ja:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0: dmi.product.name: N71Ja dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK Computer Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1561902/+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
