I'm traveling at the moment but I'll do that as soon as I can and report back...
What to think about the fact that the 4.4 kernel works fine with trusty, though? I am afraid to install the newer xorg there, in case it's the true cause of the issue. Is it worth doing a new trusty install and then upgrading X (as well as the kernel)? On Thu, Sep 1, 2016, 11:41 Christopher M. Penalver < [email protected]> wrote: > Nathan Dorfman, to keep this relevant to upstream, one would want to > test the latest mainline kernel (now 4.8-rc4) as it is released. > > Could you please advise? > > ** Tags added: bios-outdated-1.48 > > ** Changed in: linux (Ubuntu) > Status: Confirmed => Incomplete > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1612895 > > Title: > Display freezes on 2nd+subsequent logins > > Status in linux package in Ubuntu: > Incomplete > > Bug description: > First boot after a fresh install of 16.04 from the 16.04.1 amd64 > desktop ISO, with 'download updates' enabled. This is alongside an > existing 14.04 installation, which continues to work flawlessly. In > particular, this issue cannot be reproduced there. (I've installed the > -lts-xenial kernel package there, so it's version 4.4.0.34.24, but NOT > the xorg ones.) > > The first login on the new system worked fine. After simply logging > out and in again, the display freezes just after drawing my user's > desktop. (This first time, everything was drawn, but on subsequent > attempts the background was black and the top Unity panel was empty.) > The mouse cursor is movable, but no button or key presses are > recognized. > > Eventually, I press Ctrl+Alt+F1. The mouse cursor disappears > immediately; the display stays frozen and otherwise unchanged. After > another two minutes or so of waiting, I am finally dumped to the > virtual tty, which works fine. At this point a couple of kernel stack > traces appear in dmesg (see below), with timestamps corresponding to > "just now," i.e. when the vty switch finally occurred. > > Switching back to the X vty via Alt+F7 brings me back to the still- > frozen display, at which point all I can do is Ctrl+Alt+F1 and wait ~2 > minutes again. Stopping, then starting the lightdm service brings me > back to a working login screen, but logging in just freezes right back > again. Finally, rebooting the system allows me to login to a working > desktop exactly once -- logging out and in again reproduces this > problem reliably. > > The full dmesg is attached, but the short version is that stack traces > appear in pairs, summarized by the following lines on the first > occurrence: > > [ 242.116429] WARNING: CPU: 2 PID: 2539 at > /build/linux-dcxD3m/linux-4.4.0/drivers/gpu/drm/drm_irq.c:1326 > drm_wait_one_vblank+0x1b5/0x1c0 [drm]() > [ 242.116498] CPU: 2 PID: 2539 Comm: Xorg Not tainted 4.4.0-31-generic > #50-Ubuntu > > and by the following, slightly different ones, on the second and > beyond: > > [ 380.232443] WARNING: CPU: 1 PID: 4173 at > /build/linux-dcxD3m/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:3963 > intel_crtc_wait_for_pending_flips+0x1e2/0x240 [i915]() > [ 380.232563] CPU: 1 PID: 4173 Comm: Xorg Tainted: G W > 4.4.0-31-generic #50-Ubuntu > > ProblemType: Bug > DistroRelease: Ubuntu 16.04 > Package: linux-image-4.4.0-31-generic 4.4.0-31.50 [modified: > boot/vmlinuz-4.4.0-31-generic] > ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13 > Uname: Linux 4.4.0-31-generic x86_64 > ApportVersion: 2.20.1-0ubuntu2.1 > Architecture: amd64 > AudioDevicesInUse: > USER PID ACCESS COMMAND > /dev/snd/controlC0: who 3445 F.... pulseaudio > CurrentDesktop: Unity > Date: Fri Aug 12 19:51:28 2016 > HibernationDevice: RESUME=UUID=2065ee3e-d689-4432-a805-4a7822b06d0e > InstallationDate: Installed on 2016-08-13 (0 days ago) > InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 > (20160719) > MachineType: LENOVO 4236AR5 > ProcFB: 0 inteldrmfb > ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic > root=UUID=093a7652-dfb2-4f9e-9ceb-23761b18c8ef ro quiet splash > RelatedPackageVersions: > linux-restricted-modules-4.4.0-31-generic N/A > linux-backports-modules-4.4.0-31-generic N/A > linux-firmware 1.157.2 > SourcePackage: linux > UpgradeStatus: No upgrade log present (probably fresh install) > dmi.bios.date: 10/31/2011 > dmi.bios.vendor: LENOVO > dmi.bios.version: 83ET66WW (1.36 ) > dmi.board.asset.tag: Not Available > dmi.board.name: 4236AR5 > dmi.board.vendor: LENOVO > dmi.board.version: Not Available > dmi.chassis.asset.tag: No Asset Information > dmi.chassis.type: 10 > dmi.chassis.vendor: LENOVO > dmi.chassis.version: Not Available > dmi.modalias: > dmi:bvnLENOVO:bvr83ET66WW(1.36):bd10/31/2011:svnLENOVO:pn4236AR5:pvrThinkPadT420:rvnLENOVO:rn4236AR5:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: > dmi.product.name: 4236AR5 > dmi.product.version: ThinkPad T420 > dmi.sys.vendor: LENOVO > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1612895/+subscriptions > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1612895 Title: Display freezes on 2nd+subsequent logins To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1612895/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
