Fuzzy text on 4K intermittently

[Hammer459]

I have a fairly good Nvidia GeForce Graphics card (can supposedly do at least 3 4K-monitors.
I have the most current N-vidia driver (384.111)
When I have the resolution over 1920x1080 the text (and other features to) goes blurred after a short while.
When typing, moving mouse etc the screen goes crystal clear for a moment only to fade back to blurred.
Is this a bug or is it a misconfig?

[Hoser Rob]

The "most current" driver is not necessarily the right one. Is it the one recommended by Mint Drver Manager? Because that usually is the right one.

PLease copy/paste this to the terminal and copy/paste the text output here for some proper system info:

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inxi -Fxz

[powerwagon75]

Hi Hammer,

Following this thread, as I have seen this symptom randomly, for at least 6 months now. Wish I had an easy answer for you, but as of yet have not been able to figure it out.

MSI Z170 Gaming M7 mobo
Intel i7-6700K CPU
EVGA GeForce GTX 980 GPU-- currently on driver 367.57 for the moment
16GB Crucial Vengance DDR4
Mint 18

Here's what I do know thus far:

* When blurriness begins to happen, wiggling the mouse over the blurred area does sharpen it back up for a very short time (maybe 5 seconds before it begins to decay to a blur again.)
* Created a user "Test". When logging out of my account, and logging into Test, all is crystal clear, and always stays that way. Logging out and back in to my account resumes the same blur actions. So appears to be tied to a particular user.
* Perhaps coincidentally, when this happens, and I go to restart, the shutdown process stalls. (I've selected "restart", the pop-up box goes away, then nothing else happens--you can go back to using the blurry session.) When I request a restart the second time, it works very well.
* Upon some reboots after this, it will start back up, and once again resume the blur issue. At this point a couple logout/logins seems to clear it up.
* I am using 1920x1080 resolution--haven't tried at other settings.
* Haven't been able to pin it down to any one thing I've done just prior to the behavior beginning.
* Ctl-Alt-Backspace doesn't fix it.
* Ctl-Alt-Esc doesn't fix it.

Maybe you could verify these things are the same for you, to give others more to go on.

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System:    Host: HmLx Kernel: 4.4.0-21-generic x86_64 (64 bit gcc: 5.3.1) Desktop: Cinnamon 3.0.7 (Gtk 2.24.30)
           Distro: Linux Mint 18 Sarah
Machine:   Mobo: MSI model: Z170A GAMING M7 (MS-7976) v: 1.0 Bios: American Megatrends v: 1.C0 date: 05/11/2016
CPU:       Quad core Intel Core i7-6700K (-HT-MCP-) cache: 8192 KB
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 32066
           clock speeds: max: 4000 MHz 1: 4000 MHz 2: 4000 MHz 3: 4000 MHz 4: 4000 MHz 5: 3999 MHz 6: 3999 MHz
           7: 3999 MHz 8: 3999 MHz
Graphics:  Card-1: Intel Sky Lake Integrated Graphics bus-ID: 00:02.0
           Card-2: NVIDIA GM204 [GeForce GTX 980] bus-ID: 01:00.0
           Display Server: X.Org 1.18.4 driver: nvidia Resolution: 1440x900@59.89hz, 1920x1080@60.00hz
           GLX Renderer: GeForce GTX 980/PCIe/SSE2 GLX Version: 4.5.0 NVIDIA 367.57 Direct Rendering: Yes
Audio:     Card-1 NVIDIA GM204 High Definition Audio Controller driver: snd_hda_intel bus-ID: 01:00.1
           Card-2 Intel Sunrise Point-H HD Audio driver: snd_hda_intel bus-ID: 00:1f.3
           Sound: Advanced Linux Sound Architecture v: k4.4.0-21-generic
Network:   Card: Qualcomm Atheros Killer E2400 Gigabit Ethernet Controller driver: alx port: d000 bus-ID: 03:00.0
           IF: enp3s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives:    HDD Total Size: 2250.5GB (20.9% used) ID-1: /dev/sda model: Hitachi_HTS54757 size: 750.2GB
           ID-2: /dev/sdb model: WDC_WD10EZEX size: 1000.2GB ID-3: USB /dev/sdc model: ST size: 500.1GB
Partition: ID-1: / size: 901G used: 374G (44%) fs: ext4 dev: /dev/sdb1
           ID-2: swap-1 size: 18.17GB used: 1.16GB (6%) fs: swap dev: /dev/sdb5
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 29.8C mobo: 27.8C gpu: 0.0:53C
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 391 Uptime: 9 days Memory: 11214.7/14991.3MB Init: systemd runlevel: 5 Gcc sys: 5.4.0
           Client: Shell (bash 4.3.481) inxi: 2.2.35