apport information ** Attachment added: "ProcInterrupts.txt" https://bugs.launchpad.net/bugs/1522094/+attachment/4529555/+files/ProcInterrupts.txt
-- 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/1522094 Title: WARNING: CPU: 0 PID: 233 at /build/linux-lts-vivid-pTjnAT/linux-lts- vivid-3.19.0/drivers/gpu/drm/i915/intel_crt.c:145 hsw_crt_pre_enable+0x7f/0x90 [i915]() Status in linux package in Ubuntu: Confirmed Bug description: When I connect a monitor the VGA port on the laptop - this is found in dmesg, and some of the kernel modules linked in become unstable [ btrfs for instance, if it's in use]. [ 2.962400] ------------[ cut here ]------------ [ 2.962424] WARNING: CPU: 0 PID: 233 at /build/linux-lts-vivid-pTjnAT/linux-lts-vivid-3.19.0/drivers/gpu/drm/i915/intel_crt.c:145 hsw_crt_pre_enable+0x7f/0x90 [i915]() [ 2.962425] SPLL already enabled [ 2.962426] Modules linked in: uas usb_storage hid_generic usbhid hid i915 psmouse i2c_algo_bit e1000e drm_kms_helper ahci libahci sdhci_pci drm ptp pps_core pata_acpi wmi sdhci_acpi video sdhci [ 2.962437] CPU: 0 PID: 233 Comm: plymouthd Not tainted 3.19.0-37-generic #42~14.04.1-Ubuntu [ 2.962438] Hardware name: Dell Inc. Latitude E6540/0PXPYJ, BIOS A15 05/19/2015 [ 2.962439] ffffffffc02fd7f8 ffff880220d23ab8 ffffffff817af92b 0000000000003a7a [ 2.962440] ffff880220d23b08 ffff880220d23af8 ffffffff81074e0a 0000000000000046 [ 2.962442] ffff880035fb0000 ffff88003615eb60 ffff880035f8f400 ffff88003615e800 [ 2.962444] Call Trace: [ 2.962449] [<ffffffff817af92b>] dump_stack+0x45/0x57 [ 2.962452] [<ffffffff81074e0a>] warn_slowpath_common+0x8a/0xc0 [ 2.962453] [<ffffffff81074e86>] warn_slowpath_fmt+0x46/0x50 [ 2.962464] [<ffffffffc02b601f>] hsw_crt_pre_enable+0x7f/0x90 [i915] [ 2.962475] [<ffffffffc02a1a7c>] haswell_crtc_enable+0x3fc/0xaf0 [i915] [ 2.962485] [<ffffffffc029f1a2>] __intel_set_mode+0x872/0xc60 [i915] [ 2.962495] [<ffffffffc02a5af2>] intel_crtc_set_config+0x9e2/0xf60 [i915] [ 2.962506] [<ffffffffc010382f>] drm_mode_set_config_internal+0x6f/0x110 [drm] [ 2.962511] [<ffffffffc019e5c8>] restore_fbdev_mode+0xc8/0xf0 [drm_kms_helper] [ 2.962515] [<ffffffffc01a04e9>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper] [ 2.962525] [<ffffffffc02b31ee>] intel_fbdev_restore_mode+0x1e/0x50 [i915] [ 2.962536] [<ffffffffc02d787e>] i915_driver_lastclose+0xe/0x20 [i915] [ 2.962541] [<ffffffffc00f6c4e>] drm_lastclose+0x2e/0x130 [drm] [ 2.962546] [<ffffffffc00f7088>] drm_release+0x338/0x540 [drm] [ 2.962549] [<ffffffff811ee077>] __fput+0xe7/0x220 [ 2.962551] [<ffffffff811ee1fe>] ____fput+0xe/0x10 [ 2.962553] [<ffffffff81091e3c>] task_work_run+0xac/0xd0 [ 2.962556] [<ffffffff81015007>] do_notify_resume+0x97/0xb0 [ 2.962558] [<ffffffff817b762f>] int_signal+0x12/0x17 [ 2.962559] ---[ end trace b6b778d930eaeda7 ]--- This is the lts-vivid kernel. downgrading to the lts-utopic kernel fixes the issue. I tried the wily-lts, same issue. I've also tried to recent kernels in http://kernel.ubuntu.com/~kernel- ppa : linux-image-4.3.0-040300-generic_4.3.0-040300 is still broken linux-image-4.4.0-040400rc3-generic_4.4.0-040400rc3.201511300321 works fine! :) --- ApportVersion: 2.14.1-0ubuntu3.19 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jcat 2559 F.... pulseaudio /dev/snd/controlC1: jcat 2559 F.... pulseaudio CurrentDesktop: GNOME DistroRelease: Ubuntu 14.04 HibernationDevice: RESUME=UUID=b338325d-c293-4b5b-ab0a-542a7f02236f InstallationDate: Installed on 2015-11-25 (8 days ago) InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) MachineType: Dell Inc. Latitude E6540 NonfreeKernelModules: fglrx Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-39-generic.efi.signed root=UUID=8c468c94-323c-4526-b3a2-e1eddacbed42 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.19.0-39.44~14.04.1-generic 3.19.8-ckt9 RelatedPackageVersions: linux-restricted-modules-3.19.0-39-generic N/A linux-backports-modules-3.19.0-39-generic N/A linux-firmware 1.127.19 Tags: trusty Uname: Linux 3.19.0-39-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 05/19/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A15 dmi.board.name: 0PXPYJ dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA15:bd05/19/2015:svnDellInc.:pnLatitudeE6540:pvr01:rvnDellInc.:rn0PXPYJ:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E6540 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1522094/+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
