This is also happening to Nvidia cards ,as confirmed by Jira residents.
This happens on both the RC and main 1.19.1.4 .
Latest Forceware used.

Second Life 1.20.0 (84432) Apr 9 2008 03:59:09 (Second Life Release)

CPU: Intel Core 2 Series Processor (2671 MHz)
Memory: 1024 MB
OS Version: Microsoft Windows XP Service Pack 2 (Build 2600)
Graphics Card Vendor: NVIDIA Corporation
Graphics Card: GeForce 7950 GT/PCI/SSE2
OpenGL Version: 2.1.2
LLMozLib Version: [LLMediaImplLLMozLib] - 2.01.14421 (Mozilla GRE version 1.8.1.13_0000000000)

However on Nvidia cards usually only Objects are affected(Sculpties seems to have the most affect).

This changes with VBO off, Laggy but no more of these graphical glitches.

--------


Status (as of April 10, 2008, from the meeting described here: http://blog.secondlife.com/2008/04/09/1191-viewer-a-lovehate-relationship/ ):

This was traced to a problem with ATI's drivers - LL is working with them towards a solution. While they're fixing this, you can try turning VBO off, then set your graphics settings to LOW and adjust upwards from there. It won't be as fast as it should be, but it'll be usable until this gets fixed. (To access your settings before sign-in, go to Edit -> Preferences.)

===

Original summary: VBO render bug with objects on ATI graphics cards blocking the view.

On my Older spare backup "pentuim 4 Extreme edtion 3.4 ghz with a ati x1950 pro 512mb " objects will sometimes not render in the correct way often causing disply courrption in the geomotry making the object lose it's shape and block the screen. It looks like a vertex rendering error but the screen is so messed up i can never tell exactly what objects are doing it.


see picture of screen attachment the screen is filled with many rendering errors On screen shot the entire screen is filled with error render objects covering the right hand HUD and center of screen ETC.
This effect is more noticeable the more the camrea is rotated.

(I have posted a screen from the non-windlight viewer to show how the area objects should be rendered.)



This does not happen on My other quad core machine with a nvida 8800 GTX using Vista or windows XP sp2.
But has seem to effect other peoples system with an x1000 series card. (ati x1300,1600,1800 ETC)

since many with ATI gpus seem to have this issue and you can not see anything in the game when this happens I listed it as "critical"





I was running it with Graphics detail set to "ultra" and in window mode with desktop res set to 1280x1024 under an fully updated windows xp SP2.

This has happend with other version of the viewer but is happens far more often on this version of windlight the moment you log on every time.


(repost of this issue since I made a major personal mistake on the first post.)





System specs detailed
=----------------------------------

Property Value
Manufacturer ASUSTeK Computer Inc.
Model P4C800-E
Version Rev 1.xx
Serial Number MB-1234567890

Chipset Vendor Intel Corporation
Chipset Model 82875P,E7210 Memory Controller Hub
North Bridge Intel 875P
South Bridge 82801EB/ER (ICH5/ICH5R) LPC Interface Bridge
SMBus Intel Corporation 82801EB/ER (ICH5/ICH5R) SMBus Controller @0400h

CPU Intel Pentium 4 XE
Cpu Socket Socket 478 [CPU 1]
Processor Upgrade
Max CPU Speed 3600 MHz

System Slots 5 PCI, 1 AGP

OnBoard devices
Ethernet (Enabled) Intel CSA 82547EI

Memory Summary
Location System board or motherboard
Maximum Capacity 4096 MBytes
Memory Slots 4
Error Correction Single-bit ECC
Use System memory
Maximum Memory Module Size 1024 MBytes

Warning! Accuracy of DMI data cannot be guaranteed

Property Value
Manufacturer To Be Filled By O.E.M.
Product Name To Be Filled By O.E.M.
Version To Be Filled By O.E.M.
Serial Number To Be Filled By O.E.M.
Chassis Desktop
Infrared (IR) Supported No
Machine Type AT/AT COMPATIBLE
UUID 03000200-0400-0500-0006-000700080009


Physical Memory 2047 MB Total, 1168 MB Free
Memory Load 42%

Virtual Memory 3944 MB Total, 2817 MB Free

PageFile Name \??\C:\pagefile.sys
PageFile Size 2047 MB
In use 398 MB
Max used 398 MB
Registry Size 2 MB (current), 119 MB (maximum)

Profile GUID {080b03c0-8d72-11dc-bce8-806d6172696f}

The system clock interval 15 ms

Warning! Accuracy of DMI data cannot be guaranteed


pci devices
----------------------

Bus/Dev./Func. Type Class Type Manufacturer Device Name Sub System Device Vendor Sub System Device Name
00 / 00 / 00 PCI PCI to HOST Bridge Intel Corporation 82875P,E7210 Memory Controller Hub ASUSTeK Computer Inc
00 / 01 / 00 PCI PCI to PCI Bridge Intel Corporation 82875P PCI to AGP Bridge
00 / 03 / 00 PCI PCI to PCI Bridge Intel Corporation 82875P,E7210 PCI to CSA Bridge
00 / 29 / 00 PCI USB (UHCI) Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #1 ASUSTeK Computer Inc
00 / 29 / 01 PCI USB (UHCI) Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #2 ASUSTeK Computer Inc
00 / 29 / 02 PCI USB (UHCI) Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #3 ASUSTeK Computer Inc
00 / 29 / 03 PCI USB (UHCI) Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #4 ASUSTeK Computer Inc
00 / 29 / 07 PCI USB 2.0 (EHCI) Intel Corporation 82801EB/ER (ICH5/ICH5R) USB 2.0 EHCI Controller ASUSTeK Computer Inc
00 / 30 / 00 PCI PCI to PCI Bridge Intel Corporation 801EB/ER Hub Interface to PCI Bridge (ICH5/ICH5R A2/A3 step)
00 / 31 / 00 PCI PCI to ISA Bridge Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC Interface Bridge
00 / 31 / 01 PCI IDE (ATA) Intel Corporation 82801EB/ER (ICH5/ICH5R) EIDE Controller ASUSTeK Computer Inc
00 / 31 / 02 PCI IDE (ATA) Intel Corporation 82801EB (ICH5) SATA Controller ASUSTeK Computer Inc
00 / 31 / 03 PCI SMBus Controller Intel Corporation 82801EB/ER (ICH5/ICH5R) SMBus Controller ASUSTeK Computer Inc
01 / 00 / 00 AGP VGA Controller ATI Technologies Inc Radeon X1950 Pro (PCIe) PC Partner Ltd
01 / 00 / 01 PCI Other Display Controller ATI Technologies Inc Radeon X1950 Pro (Secondary) (PCIe) PC Partner Ltd
02 / 01 / 00 PCI Ethernet Intel Corporation 82547EI Gigabit Ethernet Controller (LOM) ASUSTeK Computer Inc
03 / 03 / 00 PCI OHCI FireWire VIA Technologies Inc VT6306 VIA Fire II IEEE-1394 OHCI Link Layer Controller ASUSTeK Computer Inc
03 / 11 / 00 PCI Audio Device Creative Labs Sound Blaster X-Fi Creative Labs Sound Blaster X-Fi Fatal1ty
03 / 12 / 00 PCI Other Mass Storage Controller Promise Technology Inc PDC20268 Ultra100 TX2 EIDE Controller Promise Technology Inc PDC20268 Ultra100 TX2 EIDE Controller




-------------------------------------------------

video card


Property Value

Number of GPUs 2
Number of GPUs in SLI mode 203
Display Adapter Radeon X1950 Pro
Video Processor ATI Radeon Graphics Processor AGP (0x7280)
Video memory size 512 MBytes
Adapter DAC Type Internal DAC(400MHz)
BIOS Date 12/04/06
Display Drivers ati2dvag.dll
Driver Version 6.14.10.6727
Driver Date 2007-09-29 03:05:59
Inf File Name oem12.inf
Inf Section ati2mtag_R580

Display Adapter Radeon X1950 Pro Secondary
Video Processor ATI Radeon Graphics Processor AGP (0x72A0)
Video memory size 512 MBytes
Adapter DAC Type Internal DAC(400MHz)
Display Drivers ati2dvag.dll
Driver Version 6.14.10.6727
Driver Date 2007-09-29 03:05:59
Inf File Name oem12.inf
Inf Section ati2mtag_R580


Name Radeon X1950 Pro
Chip Type ATI Radeon Graphics Processor AGP (0x7280)
DAC Type Internal DAC(400MHz)
Memory 512 MBytes


------------------------------

CPU

------------------------
Property Value
Number of CPU(s) One Physical Processor / One Core / 2 Logical Processors
Vendor GenuineIntel
CPU Full Name Intel Pentium 4 XE
CPU Name Intel(R) Pentium(R) 4 CPU 3.40GHz
CPU Code Name Gallatin
Technology 0.13µ
Platform Name Socket 478
Type Original OEM processor
FSB Mode QDR
Platform ID 2
Microcode ID 2B
Type ID 0
CPU Clock 3398.39
System Bus Clock -1.0
System Clock 199.91
Multiplier 17.00
Original Clock 3400.00
Original Bus Clock 800.00
Original System Clock 200.00
Original Multiplier 17.00
L2 Cache Speed 3398.39 MHz
L2 Cache Speed Full
CPU Family / Model / Stepping F / 2 / 5
Brand ID 09
APIC 01
HyperThreading 2
L1 T-Cache 12 KµOps
L1 D-Cache 8 KB
L2 Cache 512 KB
L3 Cache 2048 KB
RDMSR 00000080 00000000 11120011 00000000
MMX Yes
SSE Yes
SSE2 Yes
SSE3 No
SSSE3 No
DualCore No
HyperThreading Yes
IA-64 No
Intel 64 (EM64T) No
XD No
VT No
SpeedStep No
Architecture x86