I am running a VMWare Player with a Ubuntu 12.04 LTS Precise Pangolin as Guest on my Windows 7. Sometimes I get the shutdown blue screen error in Windows, this time it happened when I was running the Player. When I restarted everything Ubuntu gave me the &quot;Login Loop&quot; on adminstrator login. I log in and there's this black screen where I can only read:  piix4...smbus:0.0.0.07.3 Host Smbus controller not enabled .    When I go to the prompt in root mode it fails to update and only upgraded, specially some plugins ( I think graphic plugins) which also appear in one an error message after quitting the prompt, but they´are successfully installed. They are not the error message. After that I have been working with the Fail/safe Mode recovery panel. When I try to update via Root I get errors like this: W:failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/release.gpg could not        resolve 'extras/ubuntu.com  There are 8 more like this referring to areas like: -archive/canonical.com -ppa.Launchpad.net -security.Ubuntu.com -Us.archive.ubuntu.com - release.gpg                         precise-updates/release.gpg                         precise_backport/release.gpg   Final Message: some index files failed to download.....they have been ignored or old files are used. The black screens most of the time pass by too fast for me to pick up any information. But in general I think I have done everything I was able to in the recovery panel including updating network and graphic packages and recovering filesystem packages and the basic stuff ( I am a beginner regarding Linux ) in the root prompt. Now I am stuck in this screen with graphic options: - Run in low-graphics mode just for one session - Reconfigure Graphics - Troubleshoot the error - Exit to console login  I am trying to choose to reconfigure graphics but the mouse disappears in the virtual machine screen and sometimes when options change it´s only the first and last option. But this happens from the blue without messages. This particular option menu is in the regular GUI style against a black screen in Terminal style. Really strange.
1378
My Ubuntu is stuck in a login loop when trying to enter my desktop. When I login, the screen gets black and soon after that the login screen comes back.   I've read that the problem might be caused by an error depending on the graphics, here's my graphics card: ATI Radeon 7670M
51214
I can't use VirtualBox. When I tried to create a ubuntu in it, after powering the virtual box on it gives this as output. Failed to open a session for the virtual machine Ubuntu GNOME.     VT-x is disabled in the BIOS for all CPU modes   (VERR_VMX_MSR_ALL_VMX_DISABLED).      Result Code: NS_ERROR_FAILURE (0x80004005) Component: ConsoleWrap   Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}   Please help me fix this.
54573
I can install Ubuntu 13.10 in parallels ok and then log in.  Problem is Ubuntu does an update and I get black screen / desktop such that I can't see any app windows that I open.  I've tried a few of the other suggestions and they don't work for me.
114833
I'm trying to update my vmware player Ubuntu vm to Saucy Salamander via the Software Updater app. Sadly while it was installing packages vmware player gave this really weird error I've never seen before. I can't remember what it was, but I could either proceed by clicking retry or pass onto vm, or similar options. The pass onto vm option caused the vm to crash completely.   Upon trying to boot up the vm again, I got this strange error saying I can either take ownership of the vm or cancel the boot. Really weird, but the take ownership option said it could damage my vm.  I decided to shut down Windows 7 instead. Upon restarting my pc, I can boot up my vm fine, and while Software Updater starts up okay, it keeps greying out when it finishes checking for updates.  Launching Software Updater from the command line by running   $ sudo update-manager   reveals these errors are occuring:  Error loading .desktop file /usr/share/applications/gnomine.desktop: constructor returned NULL Error loading .desktop file /usr/share/app-install/desktop/gnome-mines:gnome-mines.desktop: constructor returned NULL Error loading .desktop file /usr/share/applications/gnome-sudoku.desktop: constructor returned NULL Error loading .desktop file /usr/share/app-install/desktop/gnome-sudoku:gnome-sudoku.desktop: constructor returned NULL Error loading .desktop file /usr/share/applications/mahjongg.desktop: constructor returned NULL Error loading .desktop file /usr/share/app-install/desktop/gnome-control-center-signon:update-accounts.desktop: constructor returned NULL   No idea how to proceed, but this is my third boot now and it's the same story.   Ubuntu working perfectly, but Software Updater/update-manager is completely fried. Any advice guys? Ubuntu nooby talking here, but does this mean the problem is superficial? It's just something to do with the GUI and can be easily fixed? It's not like I was attempting anything mental for goodness sake.   Could this fix the error?  sudo apt-get install -f   Before I run it, what does the f flag do exactly?   Update  Left it running for about 60 minutes, and it resolved itself! It says I can only do a partial update though, and that problem can be caused by damaged or unofficial software. Is this damage caused by the error before? Full message:  Not all Updates can be installed Run a partial upgrade, to install as many updates as possible.  This can be caused by: * A previous upgrade which didn't complete * Problems with some of the installed software * Inofficial software packages not provided by Ubuntu * Normal changes of a pre-release version of Ubuntu  Partial Upgrade Close   Should I be worried? The update is still in process so I don't know if I'll run into the same error again.
104765
My Ubuntu 12.04 was normally updated through the Update Manager, something about gtk. Then I rebooted and now all that shows after the splash screen is a blue screen that only shows the cursor.
33772
I recently installed Ubuntu 14.04. Shutdown and logout from the top panel are not working.  They worked fine when installing the OS, but a few days back I installed fglrx drivers for my ATI graphics card. They didn't work and I got low resolution problems and Ubuntu didn't boot. I solved it by removing the fglrx graphic driver from the recovery mode and Ubuntu started to boot and work just fine, at least that's what I thought.  But now the shutdown and logout options in the top panel don't work. I have to logout using ctrl+alt+delete and shutdown with the shutdown option in the top panel (shutdown option works after logging out but not when logged in as a user).  I re-installed Ubuntu 14.04 LTS and shutdown options worked fine but after installing updates they stopped working again. I thought its the graphic driver fglrx installation problem but now i know its not that. I think its a problem with some file that got installed from Ubuntu updates.  Does any one know how to solve it?
44518
I am experienced the following issue: after hibernation (using command sudo systemctl hibernatein a terminal or the menu on the right top of Ubuntu desktop) I get a black screen (Even though all devices seem to work. The fan works!) and I am forced to reboot the OS because resume failed and I can't back to a "saved state". The content in etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla is:      [Re-enable hibernate by default in upower] Identity=unix-user:* Action=org.freedesktop.upower.hibernate ResultActive=yes  [Re-enable hibernate by default in logind] Identity=unix-user:* Action=org.freedesktop.login1.hibernate;org.freedesktop.login1.handle-hibernate-key;org.freedesktop.login1;org.freedesktop.login1.hibernate-multiple-sessions;org.freedesktop.login1.hibernate-ignore-inhibit ResultActive=yes   Additional info: Ubuntu version: 16.04LTS  Kernel version:   uname -r 4.13.0-26-generic   Graphic info:   udo lspci | grep -E 'VGA|Display' [sudo] password di michele:  00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6730M/6770M/7690M XT] (rev ff) michele@michele-ubuntu:~$ sudo lshw -c display | grep driver        configuration: driver=i915 latency=0   CPU info:  sudo lscpu [sudo] password di michele: Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 8 On-line CPU(s) list: 0-7 Thread(s) per core: 2 Core(s) per socket: 4 Socket(s): 1 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 42 Model name: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz Stepping: 7 CPU MHz: 1995.561 CPU max MHz: 2900,0000 CPU min MHz: 800,0000 BogoMIPS: 3991.12 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 256K L3 cache: 6144K NUMA node0 CPU(s): 0-7 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm epb pti tpr_shadow vnmi flexpriority ept vpid xsaveopt dtherm ida arat pln pts   Why does the resuming fail?  Thanks in advance for your help.
69204
I have looked all over the Internet trying to find a fix, but I can't seem to find one. I have a custom built PC running an AMD processor, Nvidia graphics, 16GB of ram and a 1TB HDD for Ubuntu. I am not trying to dual boot, I just have Ubuntu 13.04 on the hard drive nothing else.  Every time I press 'Shutdown' or 'Restart', it goes through its normal shutting down thing; but, after that, there is just a black screen and nothing more. Nothing happens, it's just black. The only way for me to turn off Ubuntu at the moment is to press shutdown, wait for the screen to go dark, and then force shutdown it by pressing the physical shutdown button on the PC.  Could someone please tell me what is wrong and how I can get Ubuntu to work correctly? (Never had this problem when I was dual booting on my old HDD.)  P.S. I am able to log out.  After running Sudo shutdown it gave me an error this is the error:  'Modem-manger[5062]: Could not get the system bus. Make sure the message bus daemon is running! Message: Failed to connect to socket /var/run/dbus/system_bus_socket: No such file or directory modem-manger[5078]:  ModeUbuntu 13.04rsion 0.6.0.0) starting... modem-manger[5078]: Could not get. . . . m bus. Make sure the message [FAIL] e   * Will now switch to single-user modenect to socket /var/run/dbus/system_bus_so root@mauritz-ubuntu:~# irectory'  And then just a ton of OK checking's, To me it seems like much of the text that it is displaying is overlapping on other text, so thats why it seems really weird.  Second error (running sudo shutdown as root): "sudo shutdown now *Disabling power management... [OK] Saned disabled; edit /etc/default/saned Speech-dispatcher disabled; edit /etc/default/speech-dispatcher  * Asking all remaining processes to terminate... [OK]  * Killing all remaining processes... [FAIL]  * Will now switch to singel-user mode"
4603
I was able to install Ubuntu 12.04 using the alternative version of the image, (64 bit) but when I start the system it tells me the GPU  locked up, and instead presents a text only screen.  I understand that this site is not for bug reports, but at the same time, I know that there are some versions of the installer than have to be compatible with my graphics card (Nvidia GTS 360M).  I assumed that the mere fact that the alternative installer ran was an indication that I could get some sort of graphical interface running after the install.  Is there some way of getting some type of graphical interface running on my machine? Even better would be is there a way to get the rest of the system running as normal (i.e. GPU up and running)?  If an internet connection is required to download driver support or something similar, directions for how to configure a wireless connection with WPA2-Personal protection from the text-only interface (bash).  Any help would be appreciated.  Note: I was able to find  which tells me that the card is supported.  Note 2: In the install software stage of the install, I was unable to install anything (no internet connection)  Update: The exact error message is [8.591394] [drm] 0000:01:00.0: GPU Lockup - switching to software fbcon  Update 2: If I try to install with the regular version of Ubuntu, the screen goes staticy. This also happens if I install with Wubi (distasteful I know) and then try to use Ubuntu.  Update 3: I've tried xforcevesa, nomodeset and xforcevesa nomodeset as my wubi boot options.  Update 4: Thanks to jokerdino, I can now connect to the internet, so internet tools would now be a possibility.
82688
For the past two weeks, I've been getting this BSOD error on my Lenovo laptop. I have even reset my laptop ("rest this PC"), but it's still happening.  My laptop details:     I have the latest Nvidia driver for my Nvidia Geforce MX150: 431.60 released on 23 Jul 2019.  I have the latest BIOS for my laptop: 8TCN53WW15  released on 15 Jul 2019.     I have run WhoCrashed, it says it says the problem was caused by some driver which could not be identified. If I get to know the problematic driver I will update/uninstall it.  How can I analyze my dump files, so that I can find the problematic driver?  Edit 1: If you get "Oops there was a problem with the network" on google drive page while accessing dump files, just click on download. They will be downloaded. I don't know what's causing this.
70381
I have Ubuntu Precise beta 2 and Windows7 set up to dual boot.  The set up had been perfect, until today, with a black screen presented when trying to boot Windows with a BOOTMGR image is corrupt, cannot boot fault.  Is there any way to fix this from Ubuntu, or is a reinstall my only option?
11146
I'm running an Ubuntu 16.04 (ext4) and Windows 10 (ntfs) dual boot environment which worked perfectly until I seemed to have crashed it by switching temporarily from UEFI Only to Legacy Only in my bios to run hard drive diagnostic tools from USB.  Now the initial splash screen has changed and the grub menu (version 2.02~beta2-36ubuntu3.7) shows up in much lower resolution (640x480) then before.   This is not really a problem for me, but when I choose to start Ubuntu this message pops up for a second:  error: Invalid video mode specification 'text'. Booting in blind mode   Then two more message lines are shown:  [1.895670][drm: intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A [1.895696][drm: intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun   After this, the Ubuntu loading screen appears in high resolution, but exits in emergency mode where I can login as root user.  When I type in glxinfo in Terminal I get Error: unable to open display.  It all seems to me that there is an issue with loading the Intel grahpics driver in Ubuntu (Windows starts without problems).  Has anybody experienced a similar issue before or better can help me to get my Ubuntu booting again? I've searched through the forums, but couldn't find a helpful solution yet. Would be great!  Update @rod-smith (see answer below) helped me already with UEFI/CMS/Legacy settings and got me back to the previous splash screen and the grub menu in high resolution. However, the main problem: error: Invalid video mode specification 'text'. Booting in blind mode still persists and I end up in emergency mode. Any more suggestions how to handle this?  If it helps, I'm running a Lenovo Thinkpad X1 Carbon from 2013.  Update 2 When I run journalctl -xb in emgergency mode, some red messages show up. Within them the messages fsck failed with error code 4 and Failed to Start File System Check on /dev/disk/by-uuid/..... Maybe this can help.  Update 3 The problem is solved. See my answer below.
102893
After the screen saver activates, or after I manually lock the screen via Ctrl+Alt+L, I see a blank black screen with just the date / time in the upper right corner. A few seconds after that, my HP flat screen monitor(s) lose the video signal and display ugly hopping "No Input Signal" boxes.  I'd like to keep the blank black screen (It's less distracting, consumes about as much power, and allows me to unlock faster, as the monitors don't have to re-sync), so Ubuntu should keep driving the video output while the screen is locked.  How can I configure this? I'm using Ubuntu 14.04.3 LTS with the Gnome Classic Fall-back. Graphics card is NVIDIA with the open source Nouveau driver, but I also see this with an external HP NL571AA USB graphics adapter.
54339
Basic System specs:   Samsung SSD 500GB CPU: Intel i5-7500  RAM: 16GB GPU: NVIDIA GeForce GTX1080 Currently configured to Dual Boot with Windows 10 64bit, but Windows boots without any havoc.   Issue:  Ubuntu 16.04 hangs in boot splash screen indefinitely, but after trying to fix it, now it successfully boots into shell mode. In addition, even pressing on ESC when it hangs doesn't display any logs.  So I couldn't see the boot log other than SSHing into my desktop, and open /var/log/boot.log  Here's what I got, while it was hanging:  [  OK  ] Started Network Manager Wait Online. [  OK  ] Reached target Network is Online. [  OK  ] Started Daily apt download activities. [  OK  ] Started Daily apt upgrade and clean activities. [  OK  ] Reached target Timers. [  OK  ] Started crash report submission daemon.          Starting /etc/rc.local Compatibility... [  OK  ] Started /etc/rc.local Compatibility.          Starting Terminate Plymouth Boot Screen...          Starting Hold until boot process finishes up...   I also tried dmesg | less after numerous googling to view the boot logs, and encountered into this at the end of it:  [    2.604476] random: crng init done [    2.631750] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready [    2.651404] r8169 0000:02:00.0 enp2s0: link down [    2.651432] r8169 0000:02:00.0 enp2s0: link down [    2.651488] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready [    2.691320] NVRM: Your system is not currently configured to drive a VGA console                on the primary VGA device. The NVIDIA Linux graphics driver                requires the use of a text-mode VGA console. Use of other console                drivers including, but not limited to, vesafb, may result in                corruption and stability problems, and is not supported. [    2.861207] input: HDA NVidia HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input14 [    2.861248] input: HDA NVidia HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input15 [    2.861281] input: HDA NVidia HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input16 [    2.861312] input: HDA NVidia HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input17 [    5.426350] r8169 0000:02:00.0 enp2s0: link up [    5.426356] IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0: link becomes ready   It seems like there is an issue with the NVIDIA card as I initially thought.  What I have done to fix this problem:   Update GRUB   Went to recovery mode and open terminal Changed the boot mode from quiet splash to acpi=force to force the boot into shell, now I rolled that back. cat /etc/X11/default-display-manager reveals lightdm as the default.  Update Intel video card driver I tried using boot-repair to fix grub issues, and the results are as such on pastebin:    What I might have done to cause this problem:   sudo service lightdm stop   In an effort to attempt controlling the GPU fan headlessly. But I ran sudo service lightdm restart Now I believe lightdm doesn't start up at boot. Here is the  I followed to control GPU fan remotely  sudo service lightdm restart   I tried restarting lightdm, and it does give me some positive output which is the login screen, but I can't do anything here as it is still frozen.  I try typing stuff on the keyboard but nothing shows up.    Can someone please help me figure this out??? I am really clueless and about to cry....
42371
This didn't start out as a problem with the login loop.  I was attempting a clean install of Ubuntu 16 and using the new feature that allows it to detect proprietary drivers for me.  I started off with   When I attempted to use the recommended Nvidia Drivers, it caused the laptop to become unstable and freeze.    I attempted the remedy from that post and it resulted in a login loop.  I have attempted   sudo mv ~/.config/dconf/user ~/.config/dconf/user.old   Tried   sudo mv ~/.Xauthority ~/.Xauthority.backup sudo service lightdm restart   I have tried locating and disabling secureboot, but there is no secureboot option in the bios.  This is an HP DV2000 series laptop.  Nothing is helping    Can someone help?  edit:  Guest session does the same loop.  /var/log/Xorg.0.log shows a lot of stuff, but I took a pic of what seems relevant   Thing is the driver I first tried that started this mess was 304 drivers and the 364 drivers were supposed to be the fix according to other posts.  More editing:  I purged the nvidia files and it came back to a blank desktop w/o the interfaces so I right clicked and restored a backup.. The sidebar came back and it was running gallium.  I restarted and its the blank purple screen again.  I am thinking of just reinstalling and not using nvidia drivers.  The software center is telling me I have a presario and i should use 304 drivers.  Its not a presario. =(  At least the software center provides a suggestion for the coprocessor driver which is nice.
108811
This happened when I attempted to upgrade from 17.10 to 18.04.  I receive this error during boot, and my Ubuntu that I've had a few months running without issue twice (not counting during the upgrade) randomly reset to select user and login screen but let me back into my desktop no problem.   During the unpacking part of the update it did this and hung in a select user, type password loop not letting me into the desktop. I turned my computer off twice and on the third try I get a consistent error 256 after selecting Ubuntu from the GRUB menu. My system was at full battery during all these random resets.   How do I fix my system without losing my files? It was only 1/10 or 1/20th unpacked on the update bar. I'm on an Asus with Intel processor/graphics card.
20636
After the update neither my desktop (Asus) nor my laptop (HP) respond to the shut-down, log off or restart commands in the right top tool bar.  How do I fix the issue?