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Full Discussion: LM 17.3 xfce constant lagging
Operating Systems Linux Debian LM 17.3 xfce constant lagging Post 303024048 by Peasant on Thursday 27th of September 2018 12:58:27 PM
Old 09-27-2018
Well, for start i would look at top a bit during lag, to see any waits happening and where does the system spend most time.

High sys values are not good indicator in most cases.

Next, one should always try to examine what has changed in the video driver stack.

Can you show output of following commands as root or using sudo on both versions of operating system ?
Code:
lspci | grep -i vga
glxinfo | grep -i renderi

Perhaps more when we determine the model and make, like modinfo and lsmod

Can you confirm that you are running operating system exclusively from medium/memory, it is not installed on disk(s) ?

Regards
Peasant.
 

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LEARN ABOUT REDHAT

vga

VGA(4x) 																   VGA(4x)

NAME

       vga - Generic VGA video driver

SYNOPSIS

       Section "Device"
	 Identifier "devname"
	 Driver "vga"
	 ...
       EndSection

DESCRIPTION

       vga  is an XFree86 driver for generic VGA video cards.  It can drive most VGA-compatible video cards, but only makes use of the basic stan-
       dard VGA core that is common to these cards.  The driver supports depths 1, 4 and 8.  All relevant  visual  types  are  supported  at  each
       depth.  Multi-head configurations are supported in combination with some other drivers, but only when the vga driver is driving the primary
       head.

SUPPORTED HARDWARE

       The vga driver supports most VGA-compatible video cards.  There are some known exceptions, and those should be listed here.

CONFIGURATION DETAILS

       Please refer to XF86Config(5x) for general configuration details.  This section only covers configuration details specific to this driver.

       The driver auto-detects the presence of VGA-compatible hardware.  The ChipSet name may optionally be specified in the config file  "Device"
       section, and will override the auto-detection:

	   "generic"

       The  driver will only use 64k of video memory for depth 1 and depth 8 operation, and 256k of video memory for depth 4 (this is the standard
       VGA limit).

       When operating at depth 8, only a single built-in 320x200 video mode is available.  At other depths there  is  more  flexibility  regarding
       mode choice.

       The following driver Options are supported:

       Option "ShadowFB" "boolean"
	      Enable or disable use of the shadow framebuffer layer.  Default: off.

	      This  option is recommended for performance reasons when running at depths 1 and 4, especially when using modern PCI-based hardware.
	      It is required when using those depths in a multi-head configuration where one or more of the other screens is operating at  a  dif-
	      ferent depth.

SEE ALSO

       XFree86(1), XF86Config(5x), xf86config(1), Xserver(1), X(7x)

AUTHORS

       Authors include: Marc La France, David Dawes, and Dirk Hohndel.

XFree86 						       Version Version 4.3.0							   VGA(4x)
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