xfwm4 --vblank=xpresent --replace &

did fix this for me until last update made the problem gone for me


Here is my dmesg:

OpenBSD 6.6 (GENERIC.MP) #0: Sat Oct 26 08:08:07 MDT 2019
real mem = 8468377600 (8076MB)
avail mem = 8199020544 (7819MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xec1b0 (28 entries)
bios0: vendor American Megatrends Inc. version "UX303LAB.210" date
acpi0 at bios0: ACPI 5.0
acpi0: sleep states S0 S3 S4 S5
acpi0: wakeup devices PEG0(S4) PEGP(S4) PEG1(S4) PEGP(S4) PEG2(S4) PEGP(S4)
RP01(S4) RP02(S4) RP03(S4) RP04(S4) RP05(S4) RP06(S4) RP07(S4) RP08(S4)
GLAN(S4) EHC1(S3) [...]
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz, 2494.68 MHz, 06-3d-04
cpu0: 256KB 64b/line 8-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges
cpu0: apic clock running at 99MHz
cpu0: mwait min=64, max=64, C-substates=, IBE
cpu1 at mainbus0: apid 2 (application processor)
cpu1: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz, 2494.24 MHz, 06-3d-04
cpu1: 256KB 64b/line 8-way L2 cache
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 1 (application processor)
cpu2: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz, 2494.23 MHz, 06-3d-04
cpu2: 256KB 64b/line 8-way L2 cache
cpu2: smt 1, core 0, package 0
cpu3 at mainbus0: apid 3 (application processor)
cpu3: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz, 2494.23 MHz, 06-3d-04
cpu3: 256KB 64b/line 8-way L2 cache
cpu3: smt 1, core 1, package 0
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 40 pins
acpimadt0: bogus nmi for apid 0
acpimadt0: bogus nmi for apid 2
acpimadt0: bogus nmi for apid 1
acpimadt0: bogus nmi for apid 3
acpiec0 at acpi0
acpimcfg0 at acpi0
acpimcfg0: addr 0xf8000000, bus 0-63
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus -1 (PEG0)
acpiprt2 at acpi0: bus -1 (PEG1)
acpiprt3 at acpi0: bus -1 (PEG2)
acpiprt4 at acpi0: bus 1 (RP01)
acpiprt5 at acpi0: bus -1 (RP02)
acpiprt6 at acpi0: bus -1 (RP03)
acpiprt7 at acpi0: bus 2 (RP04)
acpiprt8 at acpi0: bus -1 (RP05)
acpiprt9 at acpi0: bus -1 (RP06)
acpiprt10 at acpi0: bus -1 (RP07)
acpiprt11 at acpi0: bus -1 (RP08)
acpicpu0 at acpi0: C3(200@506 mwait.1@0x60), C2(200@148 mwait.1@0x33),
C1(1000@1 mwait.1), PSS
acpicpu1 at acpi0: C3(200@506 mwait.1@0x60), C2(200@148 mwait.1@0x33),
C1(1000@1 mwait.1), PSS
acpicpu2 at acpi0: C3(200@506 mwait.1@0x60), C2(200@148 mwait.1@0x33),
C1(1000@1 mwait.1), PSS
acpicpu3 at acpi0: C3(200@506 mwait.1@0x60), C2(200@148 mwait.1@0x33),
C1(1000@1 mwait.1), PSS
acpipwrres0 at acpi0: PG00, resource for PEG0
acpipwrres1 at acpi0: PG01, resource for PEG1
acpipwrres2 at acpi0: PG02, resource for PEG2
acpitz0 at acpi0: critical temperature is 108 degC
acpipwrres3 at acpi0: FN00, resource for FAN0
acpipwrres4 at acpi0: FN01, resource for FAN1
acpipwrres5 at acpi0: FN02, resource for FAN2
acpipwrres6 at acpi0: FN03, resource for FAN3
acpipwrres7 at acpi0: FN04, resource for FAN4
acpitz1 at acpi0: critical temperature is 105 degC
acpitz2 at acpi0: critical temperature is 105 degC
acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
"FLT0102" at acpi0 not configured
"ATK3001" at acpi0 not configured
acpicmos0 at acpi0
acpiac0 at acpi0: AC unit online
acpibat0 at acpi0: BAT0 model "ASUS Battery" serial   type LIon oem
"PNP0C14" at acpi0 not configured
"ATK4002" at acpi0 not configured
acpials0 at acpi0: ALS_
acpibtn0 at acpi0: LID_
acpibtn1 at acpi0: SLPB
"MSFT0101" at acpi0 not configured
"INT3400" at acpi0 not configured
"INT340F" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
acpivideo0 at acpi0: GFX0
acpivout0 at acpivideo0: LCDD
cpu0: using VERW MDS workaround (except on vmm entry)
cpu0: Enhanced SpeedStep 2494 MHz: speeds: 2201, 2200, 2100, 2000, 1800,
1700, 1600, 1500, 1300, 1200, 1100, 1000, 900, 700, 600, 500 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Core 5G Host" rev 0x09
inteldrm0 at pci0 dev 2 function 0 "Intel HD Graphics 5500" rev 0x09
drm0 at inteldrm0
inteldrm0: msi
azalia0 at pci0 dev 3 function 0 "Intel Core 5G HD Audio" rev 0x09: msi
azalia0: No codecs found
"Intel Core 5G Thermal" rev 0x09 at pci0 dev 4 function 0 not configured
xhci0 at pci0 dev 20 function 0 "Intel 9 Series xHCI" rev 0x03: msi, xHCI
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "Intel xHCI root hub" rev
3.00/1.00 addr 1
"Intel 9 Series MEI" rev 0x03 at pci0 dev 22 function 0 not configured
azalia1 at pci0 dev 27 function 0 "Intel 9 Series HD Audio" rev 0x03: msi
azalia1: codecs: Conexant/0x510f
audio0 at azalia1
ppb0 at pci0 dev 28 function 0 "Intel 9 Series PCIE" rev 0xe3
pci1 at ppb0 bus 1
ppb1 at pci0 dev 28 function 3 "Intel 9 Series PCIE" rev 0xe3: msi
pci2 at ppb1 bus 2
iwm0 at pci2 dev 0 function 0 "Intel Dual Band Wireless AC 7265" rev 0x48,
pcib0 at pci0 dev 31 function 0 "Intel 9 Series LPC" rev 0x03
ahci0 at pci0 dev 31 function 2 "Intel 9 Series AHCI" rev 0x03: msi, AHCI
ahci0: port 0: 6.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, SanDisk SD7SB3Q2, X215>
sd0: 244198MB, 512 bytes/sector, 500118192 sectors, thin
ichiic0 at pci0 dev 31 function 3 "Intel 9 Series SMBus" rev 0x03: apic 2
int 18
iic0 at ichiic0
spdmem0 at iic0 addr 0x52: 4GB DDR3 SDRAM PC3-12800 SO-DIMM
pchtemp0 at pci0 dev 31 function 6 "Intel 9 Series Thermal" rev 0x03
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard
pms0 at pckbc0 (aux slot)
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vmm0 at mainbus0: VMX/EPT
efifb at mainbus0 not configured
uhidev0 at uhub0 port 1 configuration 1 interface 0 "HOLTEK USB Wireless
Device" rev 2.00/4.03 addr 2
uhidev0: iclass 3/1
ums0 at uhidev0: 5 buttons, Z dir
wsmouse1 at ums0 mux 0
uvideo0 at uhub0 port 5 configuration 1 interface 0 "SuYin USB2.0 UVC HD
Webcam" rev 2.00/1.01 addr 3
video0 at uvideo0
ugen0 at uhub0 port 8 "Intel Bluetooth" rev 2.01/0.01 addr 4
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (b276eaf75aa6aeaa.a) swap on sd0b dump on sd0b
inteldrm0: 1366x768, 32bpp
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation), using wskbd0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
iwm0: hw rev 0x180, fw ver 16.242414.0, address 60:57:18:82:b7:98

Am Fr., 1. Nov. 2019 um 14:02 Uhr schrieb Jeff <>:

> On Thu, 31 Oct 2019 13:47:06 +0000
> "Patrick Harper" <> wrote:
> > I haven't tried those settings yet (in my case GNOME Shell and
> > Xfdashboard cause the display to corrupt and seize up except the
> > cursor) but ShadowPrimary is a glamor option that should be
> > irrelevant if EXA is used.
> Thanks, my mistake, ShadowPrimary is a glamor-only option; this is
> clear from the radeon (4) man page; I believe I toggled this prior to
> switching to EXA in the hope that it would fix the corruption seen when
> I had previously toggled "SWcursor" in order to fix the mouse cursor
> vanishing when over certain widgets; this didn't help in my case
> (radeon/aruba/xfce).
> If anyone wants to try the changes I suggested, they can surely leave
> out the ShadowPrimary option.
> Toggling SwapbuffersWait and EnablePageFlip (to "off") was an attempt
> to eliminate some remaining 'rarely' flicker seen; it *seemed* to help,
> but I haven't spent a lot of time investigating, my goal was to get the
> machine usable again.
> The idea behind "EnablePageFlip" to "off" is that it seemed to look
> like graphic content was being rendered for some windows/widgets on one
> backbuffer but not on the other (again, I'm only speculating, as I
> don't know what's really going on under the hood), so that the content
> 'flickers' when page flipping is happening. This *could* be the result
> of a render operation succeeding for one back-buffer and failing for
> another; I don't really know.
> The idea behind "SwapbuffersWait" to "off" falls in the random guess
> category.  I think one would expect to maybe see some tearing
> for GL applications if this option wasn't working correctly; but, I
> could also see how a fault here could lead to flickering (depending on
> the implementation), but is probably unlikely.  I think changing this
> option may also have no effect.
> P.S. / Aside:
> For anyone experiencing graphics issues after installing 6.6,
> it might be a good idea to ensure that, if needed:
> machdep.allowaperture is set to the correct value (see: man xf86) for
> your system (and please be aware of the security implications of
> changing this value).
> regards,
> Jeff

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