Ubuntu: External screen random flashing


I'm a user of Ubuntu 14.04 on a Lenovo Thinkpad T460s and I've recently started to use an external monitor. Apparently radomly the external screen flash becoming black. It could not happen in an entire day or sometimes really often.

sudo lshw -c video   *-display                    description: VGA compatible controller     product: Sky Lake Integrated Graphics     vendor: Intel Corporation     physical id: 2     bus info: pci@0000:00:02.0     version: 07     width: 64 bits     clock: 33MHz     capabilities: pciexpress msi pm vga_controller bus_master cap_list rom     configuration: driver=i915_bpo latency=0     resources: irq:126 memory:f0000000-f0ffffff memory:e0000000-efffffff ioport:e000(size=64)    uname -a  Linux ****** 4.4.0-31-generic #50~14.04.1-Ubuntu SMP Wed Jul 13 01:07:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux  

Do you have any suggestion? Thank you!


I experienced the same problem with an external SyncMaster P2370HD monitor-HDTV as second display. I upgraded the Ubuntu Desktop to 16.04 LTS and then the kernel to 4.9 and this fixed the problem.

cat /etc/lsb-*  DISTRIB_ID=Ubuntu  DISTRIB_RELEASE=16.04  DISTRIB_CODENAME=xenial  DISTRIB_DESCRIPTION="Ubuntu 16.04.2 LTS"    uname -r  4.9.0-040900-generic  

See kernel 4.9 description for further info. This may be will help you to perform the upgrade.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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