Gfilui

After installing Ubuntu 16.04 LTS on my workstation Dell Precision m6800, when I shut down or reboot my device, on a blank page I see this message:

Unknown controller version (?). You may experience problems.

And the OS was very unstable; for instance, on login page, the background was shown with bright dots on that, and in terminal it seems that when I open terminal, a process is running, and more...

I have to give more info:

• I tried a SD memory card and it was recognized and I could see its contents.


• Before that I tried CentOS 7 1708 and I got same message on booting up to the CentOS.
  
  
  • I am naive on computer science and my aim is to use linux for biological simulations, so I will be so grateful if you answer this in simplest way.
  
  
  • My workstation config:
  
  
  • CPU Intel Core i7, 4930MX
  
  
  • Graphic card: NVIDIA Quadro k4100
  
  
  • Two hard drives: 1 HDD Seagate, 1 Samsung SSD
  
  
  • Realtek ALC32xx Series HD Audio Codec Driver
  
  
  • There is a SD card reader (sdhci-pci) attached to motherboard
  
  

I saw a command on internet which is probably useful here to report its results:

$ lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06)
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 04)
00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d4)
00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d4)
00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d4)
00:1c.4 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #5 (rev d4)
00:1c.6 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #7 (rev d4)
00:1c.7 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #8 (rev d4)
00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation QM87 Express LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: NVIDIA Corporation GK104GLM [Quadro K4100M] (rev a1)
03:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35)
11:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01)