ok, tested with the 4.0 kernel and it didn't crash... but as fglrx can't run on this config, i had to switch to radeon/mesa config returning to the 3.13.0-49-generic kernel, with also the radeon driver i also don't have any crash.
So the problem is with the fglrx driver . I'm.. or better was using fglrx-updates 13.350.1 I will keep using the radeon driver for now, to avoid the accidental drag and X11 crash... but i can revert at any time and test, if needed -- 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/1447111 Title: X11 server crash when gragging a image or text Status in linux package in Ubuntu: Incomplete Bug description: X11 server crash when gragging a image or text when using aurora firefox from mozilla.org If i use the firefox included in ubuntu 14.04, i get no crash. Still, the X11 should not crash in any application. I'm not sure if the problem can be related to fglrx, i have to try loading the machine with the radeon driver to test it ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-49-generic 3.13.0-49.83 ProcVersionSignature: Ubuntu 3.13.0-49.83-generic 3.13.11-ckt17 Uname: Linux 3.13.0-49-generic x86_64 NonfreeKernelModules: fglrx ApportVersion: 2.14.1-0ubuntu3.10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: daniel.leite 5424 F.... pulseaudio /dev/snd/controlC1: daniel.leite 5424 F.... pulseaudio daniel.leite 5798 F.... gkrellm CRDA: Error: [Errno 2] No such file or directory: 'iw' Date: Wed Apr 22 12:20:19 2015 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap InstallationDate: Installed on 2014-08-11 (253 days ago) InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) MachineType: LENOVO 20AYA05KPG ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-49-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-49-generic N/A linux-backports-modules-3.13.0-49-generic N/A linux-firmware 1.127.11 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/15/2014 dmi.bios.vendor: LENOVO dmi.bios.version: J3ET59WW (1.59 ) dmi.board.asset.tag: Not Available dmi.board.name: 20AYA05KPG dmi.board.vendor: LENOVO dmi.board.version: 0B98401 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrJ3ET59WW(1.59):bd07/15/2014:svnLENOVO:pn20AYA05KPG:pvrThinkPadS3-S440:rvnLENOVO:rn20AYA05KPG:rvr0B98401WIN:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20AYA05KPG dmi.product.version: ThinkPad S3-S440 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1447111/+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