MMat
10-19-2016, 09:30 AM
Pls see also the Edit at the end.
I run Kubuntu 14.04, Xorg version 1.18.3, displaylink driver 1.2.65.
Under Desktop effects -> Advanced, I can choose as Compositing type Xrender and Qt graphycs system Native, in which case everything works just fine except that mouse and windows tear when moved about, and I miss out on all OpenGL candy of course. Or I can choose OpenGL (any version), with Qt Native, where I can choose Tearing Prevention -> Full scene repaints, in which case searing is indeed suppressed, but CPU usage becomes unbearably high: with absolutely nothing running, except for ksysguard,
top - 11:10:52 up 13 min, 12 users, load average: 0,50, 1,22, 0,99
Tasks: 290 total, 1 running, 288 sleeping, 0 stopped, 1 zombie
%Cpu(s): 8,3 us, 5,2 sy, 0,0 ni, 83,0 id, 3,4 wa, 0,0 hi, 0,1 si, 0,0 st
KiB Mem: 8082416 total, 4234448 used, 3847968 free, 99948 buffers
KiB Swap: 8294396 total, 0 used, 8294396 free. 1810200 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
924 root 20 0 2441780 80636 8100 S 27,2 1,0 7:07.14 DisplayLinkMana
1855 root 20 0 919540 310784 278716 S 6,6 3,8 1:26.50 Xorg
3164 myn 20 0 773452 81596 60052 S 4,6 1,0 0:50.00 ksysguard
2923 myn 20 0 3301140 140852 73208 S 2,7 1,7 0:42.20 kwin
3058 myn 9 -11 297560 12760 8336 S 1,7 0,2 0:26.66 pulseaudio
3071 myn 20 0 718124 67348 53032 S 1,0 0,8 0:02.29 konsole
3441 myn 20 0 868560 42264 34648 S 0,7 0,5 0:05.26 pavucontrol
3442 myn 20 0 868840 42372 34652 S 0,7 0,5 0:05.70 pavucontrol
while the output below refers to a single instance of vlc running in one of 8 Virtual desktops.
top - 11:14:35 up 17 min, 12 users, load average: 2,05, 1,35, 1,08
Tasks: 288 total, 1 running, 286 sleeping, 0 stopped, 1 zombie
%Cpu(s): 59,9 us, 19,6 sy, 0,0 ni, 17,2 id, 3,3 wa, 0,0 hi, 0,0 si, 0,0 st
KiB Mem: 8082416 total, 4295256 used, 3787160 free, 104612 buffers
KiB Swap: 8294396 total, 0 used, 8294396 free. 1851656 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
924 root 20 0 2441780 80636 8100 S 112,6 1,0 8:26.92 DisplayLinkMana
3929 mario 20 0 881904 152076 70344 S 47,7 1,9 0:10.87 chrome
3878 mario 20 0 924428 184188 81816 S 45,7 2,3 0:11.82 chrome
4352 mario 20 0 1552428 103208 72456 S 22,9 1,3 0:05.18 vlc
3586 mario 20 0 1078068 179752 99764 S 18,9 2,2 1:03.46 chrome
1855 root 20 0 908748 305492 272224 S 13,6 3,8 1:40.50 Xorg
2923 mario 20 0 3301748 141452 72940 S 8,3 1,8 0:49.17 kwin
Here are my Xorg.0.log file, http://paste.ubuntu.com/23347605/,
my Displaylinkmanager.log file http://paste.ubuntu.com/23347606/
and my FirmwareTrace.log file http://paste.ubuntu.com/23347607/
Also, should this be needed,
$ inxi -Fz
System: Host: hague Kernel: 4.4.0-42-generic x86_64 (64 bit) Desktop: KDE 4.13.3 Distro: Ubuntu 14.04 trusty
Machine: System: TOSHIBA product: KIRA BOOK version: PSUC2U-003008
Mobo: TOSHIBA model: KIRA BOOK version: Version A0 Bios: TOSHIBA version: Version 1.40 date: 01/13/2015
CPU: Dual core Intel Core i7-5500U CPU (-HT-MCP-) cache: 4096 KB flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx)
Clock Speeds: 1: 2400.750 MHz 2: 2410.031 MHz 3: 2497.500 MHz 4: 2400.093 MHz
Graphics: Card: Intel Broadwell-U Integrated Graphics
X.Org: 1.18.3 drivers: intel (unloaded: fbdev,vesa) Resolution: 2560x1440@60.0hz, 1920x1080@60.0hz, 1920x1080@60.0hz
GLX Renderer: Mesa DRI Intel HD Graphics 5500 (Broadwell GT2) GLX Version: 3.0 Mesa 11.2.0
Audio: Card-1: Intel Wildcat Point-LP High Definition Audio Controller driver: snd_hda_intel
Card-2: Intel Broadwell-U Audio Controller driver: snd_hda_intel
Card-3: DisplayLink driver: USB Audio
Sound: Advanced Linux Sound Architecture ver: k4.4.0-42-generic
Network: Card: Intel Wireless 7265 driver: iwlwifi
IF: wlan0 state: down mac: <filter>
Drives: HDD Total Size: 500.1GB (32.7% used) 1: id: /dev/sda model: Crucial_CT500MX2 size: 500.1GB
Partition: ID: / size: 450G used: 152G (36%) fs: ext4 ID: /boot size: 237M used: 152M (68%) fs: ext2
ID: swap-1 size: 8.49GB used: 0.00GB (0%) fs: swap
RAID: No RAID devices detected - /proc/mdstat and md_mod kernel raid module present
Sensors: System Temperatures: cpu: 79.0C mobo: N/A
Fan Speeds (in rpm): cpu: N/A
Info: Processes: 289 Uptime: 22 min Memory: 2234.5/7893.0MB Client: Shell (bash) inxi: 1.9.17
which shows I use three screens, the 4KUHD of the laptop (a Toshiba Kira) plus two HD external monitors. The DisplayLink device I use is a Dell 3100 USB docking station.
This high CPU usage is a pain both when working (I often use Wolfram Mathematica for computations and graphical display of results and/or numerical simulations) and when having fun (watching a movie, Kodi, the like).
Can anyone help me?
Edit
I have also done the following experiment: since I have two external monitors, I have plugged one of them directly into the HDMI plug in the pc, while keeping the second monitor connected thru the DisplayLink device. Now, the first monitor does not tear, while the second one, i.e. the one connected thru the DisplayLink device, does.
Also, since I have also another pc with Kubuntu 16.04, I have noticed what follows: with both devices connected thru the Dell3100 Docking station, the graphical display cannot be used: certain applications (Konsole) do not display at all, others occupy most of three screens and cannot be resized, tearing is rampant, some applications freeze (others, like xterm work just fine). However, with one monitor connected once again to the pc directly and the other monitor connected to the Dell/DisplayLink dock station, everything works just fine, even though some tearing is still present, but only on the Dell-connected monitor.
All of the above seems to point to some difficulties of your software in handling 2 (or possibly more, I have not tried it) external monitors. Plus tearing, of course, or the flip side of the coin, no tearing with openGL but an abnormal CPU usage.
Am I the only one to have these issues?
I run Kubuntu 14.04, Xorg version 1.18.3, displaylink driver 1.2.65.
Under Desktop effects -> Advanced, I can choose as Compositing type Xrender and Qt graphycs system Native, in which case everything works just fine except that mouse and windows tear when moved about, and I miss out on all OpenGL candy of course. Or I can choose OpenGL (any version), with Qt Native, where I can choose Tearing Prevention -> Full scene repaints, in which case searing is indeed suppressed, but CPU usage becomes unbearably high: with absolutely nothing running, except for ksysguard,
top - 11:10:52 up 13 min, 12 users, load average: 0,50, 1,22, 0,99
Tasks: 290 total, 1 running, 288 sleeping, 0 stopped, 1 zombie
%Cpu(s): 8,3 us, 5,2 sy, 0,0 ni, 83,0 id, 3,4 wa, 0,0 hi, 0,1 si, 0,0 st
KiB Mem: 8082416 total, 4234448 used, 3847968 free, 99948 buffers
KiB Swap: 8294396 total, 0 used, 8294396 free. 1810200 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
924 root 20 0 2441780 80636 8100 S 27,2 1,0 7:07.14 DisplayLinkMana
1855 root 20 0 919540 310784 278716 S 6,6 3,8 1:26.50 Xorg
3164 myn 20 0 773452 81596 60052 S 4,6 1,0 0:50.00 ksysguard
2923 myn 20 0 3301140 140852 73208 S 2,7 1,7 0:42.20 kwin
3058 myn 9 -11 297560 12760 8336 S 1,7 0,2 0:26.66 pulseaudio
3071 myn 20 0 718124 67348 53032 S 1,0 0,8 0:02.29 konsole
3441 myn 20 0 868560 42264 34648 S 0,7 0,5 0:05.26 pavucontrol
3442 myn 20 0 868840 42372 34652 S 0,7 0,5 0:05.70 pavucontrol
while the output below refers to a single instance of vlc running in one of 8 Virtual desktops.
top - 11:14:35 up 17 min, 12 users, load average: 2,05, 1,35, 1,08
Tasks: 288 total, 1 running, 286 sleeping, 0 stopped, 1 zombie
%Cpu(s): 59,9 us, 19,6 sy, 0,0 ni, 17,2 id, 3,3 wa, 0,0 hi, 0,0 si, 0,0 st
KiB Mem: 8082416 total, 4295256 used, 3787160 free, 104612 buffers
KiB Swap: 8294396 total, 0 used, 8294396 free. 1851656 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
924 root 20 0 2441780 80636 8100 S 112,6 1,0 8:26.92 DisplayLinkMana
3929 mario 20 0 881904 152076 70344 S 47,7 1,9 0:10.87 chrome
3878 mario 20 0 924428 184188 81816 S 45,7 2,3 0:11.82 chrome
4352 mario 20 0 1552428 103208 72456 S 22,9 1,3 0:05.18 vlc
3586 mario 20 0 1078068 179752 99764 S 18,9 2,2 1:03.46 chrome
1855 root 20 0 908748 305492 272224 S 13,6 3,8 1:40.50 Xorg
2923 mario 20 0 3301748 141452 72940 S 8,3 1,8 0:49.17 kwin
Here are my Xorg.0.log file, http://paste.ubuntu.com/23347605/,
my Displaylinkmanager.log file http://paste.ubuntu.com/23347606/
and my FirmwareTrace.log file http://paste.ubuntu.com/23347607/
Also, should this be needed,
$ inxi -Fz
System: Host: hague Kernel: 4.4.0-42-generic x86_64 (64 bit) Desktop: KDE 4.13.3 Distro: Ubuntu 14.04 trusty
Machine: System: TOSHIBA product: KIRA BOOK version: PSUC2U-003008
Mobo: TOSHIBA model: KIRA BOOK version: Version A0 Bios: TOSHIBA version: Version 1.40 date: 01/13/2015
CPU: Dual core Intel Core i7-5500U CPU (-HT-MCP-) cache: 4096 KB flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx)
Clock Speeds: 1: 2400.750 MHz 2: 2410.031 MHz 3: 2497.500 MHz 4: 2400.093 MHz
Graphics: Card: Intel Broadwell-U Integrated Graphics
X.Org: 1.18.3 drivers: intel (unloaded: fbdev,vesa) Resolution: 2560x1440@60.0hz, 1920x1080@60.0hz, 1920x1080@60.0hz
GLX Renderer: Mesa DRI Intel HD Graphics 5500 (Broadwell GT2) GLX Version: 3.0 Mesa 11.2.0
Audio: Card-1: Intel Wildcat Point-LP High Definition Audio Controller driver: snd_hda_intel
Card-2: Intel Broadwell-U Audio Controller driver: snd_hda_intel
Card-3: DisplayLink driver: USB Audio
Sound: Advanced Linux Sound Architecture ver: k4.4.0-42-generic
Network: Card: Intel Wireless 7265 driver: iwlwifi
IF: wlan0 state: down mac: <filter>
Drives: HDD Total Size: 500.1GB (32.7% used) 1: id: /dev/sda model: Crucial_CT500MX2 size: 500.1GB
Partition: ID: / size: 450G used: 152G (36%) fs: ext4 ID: /boot size: 237M used: 152M (68%) fs: ext2
ID: swap-1 size: 8.49GB used: 0.00GB (0%) fs: swap
RAID: No RAID devices detected - /proc/mdstat and md_mod kernel raid module present
Sensors: System Temperatures: cpu: 79.0C mobo: N/A
Fan Speeds (in rpm): cpu: N/A
Info: Processes: 289 Uptime: 22 min Memory: 2234.5/7893.0MB Client: Shell (bash) inxi: 1.9.17
which shows I use three screens, the 4KUHD of the laptop (a Toshiba Kira) plus two HD external monitors. The DisplayLink device I use is a Dell 3100 USB docking station.
This high CPU usage is a pain both when working (I often use Wolfram Mathematica for computations and graphical display of results and/or numerical simulations) and when having fun (watching a movie, Kodi, the like).
Can anyone help me?
Edit
I have also done the following experiment: since I have two external monitors, I have plugged one of them directly into the HDMI plug in the pc, while keeping the second monitor connected thru the DisplayLink device. Now, the first monitor does not tear, while the second one, i.e. the one connected thru the DisplayLink device, does.
Also, since I have also another pc with Kubuntu 16.04, I have noticed what follows: with both devices connected thru the Dell3100 Docking station, the graphical display cannot be used: certain applications (Konsole) do not display at all, others occupy most of three screens and cannot be resized, tearing is rampant, some applications freeze (others, like xterm work just fine). However, with one monitor connected once again to the pc directly and the other monitor connected to the Dell/DisplayLink dock station, everything works just fine, even though some tearing is still present, but only on the Dell-connected monitor.
All of the above seems to point to some difficulties of your software in handling 2 (or possibly more, I have not tried it) external monitors. Plus tearing, of course, or the flip side of the coin, no tearing with openGL but an abnormal CPU usage.
Am I the only one to have these issues?