The VIA bug-fix that got added in 2.4.18 still has issues. I've
included as good a bug report as I can, and a patch that "works for me".
[1.] One line summary of the problem:
The text console gets corrupted on some VIA motherboards in 2.4.18
[2.] Full description of the problem/report:
When booting kernel 2.4.18, before /sbin/init is run, the text console
becomes corrupted and unreadable. Vertical lines appear on the screen
in a multitude of colours. The X server will still start, and run as
normal. You can login over ssh.
[3.] Keywords (i.e., modules, networking, kernel):
kernel, console, VIA
[4.] Kernel version (from /proc/version):
2.4.18-pre1 and later. Absent in 2.4.17 and earlier.
[5.] Output of Oops.. message (if applicable) with symbolic information
resolved (see Documentation/oops-tracing.txt)
N/A
[6.] A small shell script or example program which triggers the
problem (if possible)
Just boot.
[7.] Environment
I have 3000+ identical VIA KT133/Duron 750MHz machines. In 20% of these
the bug is visible, in the others, it isn't. The machines run in an
LTSP-ish configuration. The machines are supposed to be identical (they
were bought together), but have different revisions of BIOS versions,
etc. They have on-board S3 Savage cards that steal RAM from the main
RAM.
[7.1.] Software (add the output of the ver_linux script here)
Linux version 2.4.18 ([email protected]) (gcc version 2.96 20000731 (Red
Hat Linux 7.1 2.96-85)) #12 Wed Mar 27 22:34:33 SAST 2002
Gnu C 2.96
Gnu make 3.79.1
binutils 2.10.91.0.2
util-linux 2.11f
mount 2.11b
modutils 2.4.2
e2fsprogs 1.19
reiserfsprogs 3.x.0f
pcmcia-cs 3.1.22
PPP 2.4.0
isdn4k-utils 3.1pre1
Linux C Library 2.2.2
Dynamic linker (ldd) 2.2.2
Procps 2.0.7
Net-tools 1.57
Console-tools 0.3.3
Sh-utils 2.0
Modules Loaded 8139too
[7.2.] Processor information (from /proc/cpuinfo):
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 3
model name : AMD Duron(tm) Processor
stepping : 1
cpu MHz : 756.765
cache size : 64 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat
pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips : 1510.60
[7.3.] Module information (from /proc/modules):
parport_pc 21952 1 (autoclean)
lp 6048 0 (autoclean)
parport 24512 1 (autoclean) [parport_pc lp]
8139too 13168 2 (autoclean)
mii 1072 0 (autoclean) [8139too]
[7.4.] Loaded driver and hardware information (/proc/ioports,
/proc/iomem)
/proc/ioports
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
01f0-01f7 : ide0
02f8-02ff : serial(auto)
0378-037a : parport0
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
0cf8-0cff : PCI conf1
a000-a0ff : Realtek Semiconductor Co., Ltd. RTL-8139 (#2)
a000-a0ff : 8139too
a400-a4ff : Realtek Semiconductor Co., Ltd. RTL-8139
a400-a4ff : 8139too
b000-b003 : VIA Technologies, Inc. AC97 Audio Controller
b400-b403 : VIA Technologies, Inc. AC97 Audio Controller
b800-b8ff : VIA Technologies, Inc. AC97 Audio Controller
d000-d01f : VIA Technologies, Inc. UHCI USB (#2)
d400-d41f : VIA Technologies, Inc. UHCI USB
d800-d80f : VIA Technologies, Inc. Bus Master IDE
d800-d807 : ide0
d808-d80f : ide1
e200-e27f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
e800-e80f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
/proc/iomem
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-077fbfff : System RAM
00100000-0023ca1c : Kernel code
0023ca1d-002952d7 : Kernel data
077fc000-077fefff : ACPI Tables
077ff000-077fffff : ACPI Non-volatile Storage
d6000000-d60000ff : Realtek Semiconductor Co., Ltd. RTL-8139 (#2)
d6000000-d60000ff : 8139too
d6800000-d68000ff : Realtek Semiconductor Co., Ltd. RTL-8139
d6800000-d68000ff : 8139too
d7000000-d7dfffff : PCI Bus #01
d7000000-d707ffff : S3 Inc. ProSavage KM133
d7f00000-dfffffff : PCI Bus #01
d8000000-dfffffff : S3 Inc. ProSavage KM133
e0000000-efffffff : VIA Technologies, Inc. VT8363/8365 [KT133/KM133]
ffff0000-ffffffff : reserved
[7.5.] PCI information ('lspci -vvv' as root)
00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133]
(rev 81)
Subsystem: Asustek Computer, Inc.: Unknown device 8041
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
Latency: 40
Region 0: Memory at e0000000 (32-bit, prefetchable) [size=256M]
Capabilities: [a0] AGP version 2.0
Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2
Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP]
(prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR+
Latency: 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000e000-0000dfff
Memory behind bridge: d7000000-d7dfffff
Prefetchable memory behind bridge: d7f00000-dfffffff
BridgeCtl: Parity- SERR- NoISA- VGA+ MAbort- >Reset- FastB2B-
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI+ D1+ D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South]
(rev 40)
Subsystem: Asustek Computer, Inc.: Unknown device 80e7
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06)
(prog-if 8a [Master SecP PriP])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32
Region 4: I/O ports at d800 [size=16]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.2 USB Controller: VIA Technologies, Inc. UHCI USB (rev 16)
(prog-if 00 [UHCI])
Subsystem: Unknown device 0925:1234
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32, cache line size 08
Interrupt: pin D routed to IRQ 11
Region 4: I/O ports at d400 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.3 USB Controller: VIA Technologies, Inc. UHCI USB (rev 16)
(prog-if 00 [UHCI])
Subsystem: Unknown device 0925:1234
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32, cache line size 08
Interrupt: pin D routed to IRQ 11
Region 4: I/O ports at d000 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev
40)
Subsystem: Asustek Computer, Inc.: Unknown device 80e7
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin ? routed to IRQ 9
Capabilities: [68] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.5 Multimedia audio controller: VIA Technologies, Inc. AC97 Audio
Controller (rev 50)
Subsystem: Asustek Computer, Inc.: Unknown device 4005
Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin C routed to IRQ 0
Region 0: I/O ports at b800 [size=256]
Region 1: I/O ports at b400 [size=4]
Region 2: I/O ports at b000 [size=4]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139
(rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (8000ns min, 16000ns max)
Interrupt: pin A routed to IRQ 5
Region 0: I/O ports at a400 [size=256]
Region 1: Memory at d6800000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
PME(D0-,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0e.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139
(rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (8000ns min, 16000ns max)
Interrupt: pin A routed to IRQ 10
Region 0: I/O ports at a000 [size=256]
Region 1: Memory at d6000000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
PME(D0-,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
01:00.0 VGA compatible controller: S3 Inc.: Unknown device 8a26 (prog-if
00 [VGA])
Subsystem: Asustek Computer, Inc.: Unknown device 8041
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (1000ns min, 63750ns max), cache line size 08
Interrupt: pin A routed to IRQ 5
Region 0: Memory at d7000000 (32-bit, non-prefetchable) [size=512K]
Region 1: Memory at d8000000 (32-bit, prefetchable) [size=128M]
Expansion ROM at d7ff0000 [disabled] [size=64K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [80] AGP version 2.0
Status: RQ=31 SBA- 64bit- FW- Rate=x1,x2
Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>
[7.6.] SCSI information (from /proc/scsi/scsi)
N/A
[7.7.] Other information that might be relevant to the problem
(please look in /proc and include all information that you
think to be relevant):
At the end, I've included /proc/cpuinfo, /proc/ioports, /proc/iomem, and
lspci from a machine that is supposedly identical, but doesn't have the
bug. I've been playing with BIOS settings (enabling/disabling USB,
Audio, etc.), but I think I have them similar again. There are some
differences: different IRQs.
[X.] Other notes, patches, fixes, workarounds:
The following patch fixes it for me:
--- arch/i386/kernel/pci-pc.c.orig Wed Mar 27 21:09:26 2002
+++ arch/i386/kernel/pci-pc.c Wed Mar 27 22:34:24 2002
@@ -1114,6 +1114,7 @@
*
* VIA 8363,8622,8361 Northbridges:
* - bits 5, 6, 7 at offset 0x55 need to be turned off
+ * BUG?: Turning bit 5 off breaks some motherboards.
* VIA 8367 (KT266x) Northbridges:
* - bits 5, 6, 7 at offset 0x95 need to be turned off
*/
@@ -1129,8 +1130,8 @@
pci_read_config_byte(d, where, &v);
if (v & 0xe0) {
- printk("Disabling VIA memory write queue: [%02x] %02x->%02x\n",
where, v, v & 0x1f);
- v &= 0x1f; /* clear bits 5, 6, 7 */
+ printk("Disabling VIA memory write queue: [%02x] %02x->%02x\n",
where, v, v & 0x3f);
+ v &= 0x3f; /* clear bits 6,7 */
pci_write_config_byte(d, where, v);
}
}
So here is the /proc info from a working machine:
/proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 3
model name : AMD Duron(tm) Processor
stepping : 1
cpu MHz : 756.763
cache size : 64 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat
pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips : 1510.60
/proc/ioports:
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
01f0-01f7 : ide0
02f8-02ff : serial(auto)
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
0cf8-0cff : PCI conf1
a800-a8ff : Realtek Semiconductor Co., Ltd. RTL-8139 (#2)
a800-a8ff : 8139too
b000-b0ff : Realtek Semiconductor Co., Ltd. RTL-8139
b000-b0ff : 8139too
b400-b43f : Ensoniq 5880 AudioPCI
d000-d01f : VIA Technologies, Inc. UHCI USB (#2)
d400-d41f : VIA Technologies, Inc. UHCI USB
d800-d80f : VIA Technologies, Inc. Bus Master IDE
d800-d807 : ide0
d808-d80f : ide1
e200-e27f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
e800-e80f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
/proc/iomem:
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-077fbfff : System RAM
00100000-0023ca1c : Kernel code
0023ca1d-002952d7 : Kernel data
077fc000-077fefff : ACPI Tables
077ff000-077fffff : ACPI Non-volatile Storage
ee000000-ee0000ff : Realtek Semiconductor Co., Ltd. RTL-8139 (#2)
ee000000-ee0000ff : 8139too
ee800000-ee8000ff : Realtek Semiconductor Co., Ltd. RTL-8139
ee800000-ee8000ff : 8139too
ef000000-efdfffff : PCI Bus #01
ef000000-ef07ffff : S3 Inc. ProSavage KM133
eff00000-f7ffffff : PCI Bus #01
f0000000-f7ffffff : S3 Inc. ProSavage KM133
f8000000-fbffffff : VIA Technologies, Inc. VT8363/8365 [KT133/KM133]
ffff0000-ffffffff : reserved
lspci -vvv:
00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133]
(rev 81)
Subsystem: Asustek Computer, Inc.: Unknown device 8041
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
Latency: 40
Region 0: Memory at f8000000 (32-bit, prefetchable) [size=64M]
Capabilities: [a0] AGP version 2.0
Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2
Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP]
(prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR+
Latency: 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000e000-0000dfff
Memory behind bridge: ef000000-efdfffff
Prefetchable memory behind bridge: eff00000-f7ffffff
BridgeCtl: Parity- SERR- NoISA- VGA+ MAbort- >Reset- FastB2B-
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI+ D1+ D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South]
(rev 40)
Subsystem: Asustek Computer, Inc.: Unknown device 80e7
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06)
(prog-if 8a [Master SecP PriP])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32
Region 4: I/O ports at d800 [size=16]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.2 USB Controller: VIA Technologies, Inc. UHCI USB (rev 16)
(prog-if 00 [UHCI])
Subsystem: Unknown device 0925:1234
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32, cache line size 08
Interrupt: pin D routed to IRQ 5
Region 4: I/O ports at d400 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.3 USB Controller: VIA Technologies, Inc. UHCI USB (rev 16)
(prog-if 00 [UHCI])
Subsystem: Unknown device 0925:1234
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32, cache line size 08
Interrupt: pin D routed to IRQ 5
Region 4: I/O ports at d000 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev
40)
Subsystem: Asustek Computer, Inc.: Unknown device 80e7
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin ? routed to IRQ 9
Capabilities: [68] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0c.0 Multimedia audio controller: Ensoniq CT5880 [AudioPCI] (rev 03)
Subsystem: Asustek Computer, Inc.: Unknown device 803a
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Latency: 32 (3000ns min, 32000ns max)
Interrupt: pin A routed to IRQ 5
Region 0: I/O ports at b400 [size=64]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139
(rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (8000ns min, 16000ns max)
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at b000 [size=256]
Region 1: Memory at ee800000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
PME(D0-,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0f.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139
(rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (8000ns min, 16000ns max)
Interrupt: pin A routed to IRQ 10
Region 0: I/O ports at a800 [size=256]
Region 1: Memory at ee000000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
PME(D0-,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
01:00.0 VGA compatible controller: S3 Inc.: Unknown device 8a26 (prog-if
00 [VGA])
Subsystem: Asustek Computer, Inc.: Unknown device 8041
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (1000ns min, 63750ns max), cache line size 08
Interrupt: pin A routed to IRQ 11
Region 0: Memory at ef000000 (32-bit, non-prefetchable) [size=512K]
Region 1: Memory at f0000000 (32-bit, prefetchable) [size=128M]
Expansion ROM at efff0000 [disabled] [size=64K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [80] AGP version 2.0
Status: RQ=31 SBA- 64bit- FW- Rate=x1,x2
Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>
--
Berend De Schouwer
On Wed, Mar 27, 2002 at 09:17:30PM +0200, Berend De Schouwer wrote:
[...]
> I have 3000+ identical VIA KT133/Duron 750MHz machines. In 20% of these
> the bug is visible, in the others, it isn't. The machines run in an
> LTSP-ish configuration. The machines are supposed to be identical (they
> were bought together), but have different revisions of BIOS versions,
> etc. They have on-board S3 Savage cards that steal RAM from the main
> RAM.
Aha, another. You're the fourth or fifth person with this problem. I
have a patch very similar to yours. What my patch does is only clear
bit 7, which is what was experimentally determined to disable the Write
Memory Queue. So far it seems that only KM133 (KT133 w/onboard S3
Savage) are afflicted.
However, the patch isn't being accepted until an explanation from VIA is
obtained (apparently the head kernel honcho's were explicitly told to
clear bit 5). I'm working on that now.
--
-Steven
In a time of universal deceit, telling the truth is a revolutionary act.
-- George Orwell
He's alive. He's alive! Oh, that fellow at RadioShack said I was mad!
Well, who's mad now?
-- Montgomery C. Burns
Am Mittwoch, 27. M?rz 2002 23:55 schrieb Steven Walter:
> On Wed, Mar 27, 2002 at 09:17:30PM +0200, Berend De Schouwer wrote:
> [...]
>
> > I have 3000+ identical VIA KT133/Duron 750MHz machines. In 20% of these
> > the bug is visible, in the others, it isn't. The machines run in an
> > LTSP-ish configuration. The machines are supposed to be identical (they
> > were bought together), but have different revisions of BIOS versions,
> > etc. They have on-board S3 Savage cards that steal RAM from the main
> > RAM.
>
> Aha, another. You're the fourth or fifth person with this problem. I
> have a patch very similar to yours. What my patch does is only clear
> bit 7, which is what was experimentally determined to disable the Write
> Memory Queue. So far it seems that only KM133 (KT133 w/onboard S3
> Savage) are afflicted.
Well, I had a corrupted screen [unreadable characters], after running KDE rc3 for a few hours. Seems like the console font has been corrupted.
>
> However, the patch isn't being accepted until an explanation from VIA is
> obtained (apparently the head kernel honcho's were explicitly told to
> clear bit 5). I'm working on that now.
On Thu, 2002-03-28 at 00:55, Steven Walter wrote:
> On Wed, Mar 27, 2002 at 09:17:30PM +0200, Berend De Schouwer wrote:
> [...]
> > I have 3000+ identical VIA KT133/Duron 750MHz machines. In 20% of these
> > the bug is visible, in the others, it isn't. The machines run in an
> > LTSP-ish configuration. The machines are supposed to be identical (they
> > were bought together), but have different revisions of BIOS versions,
> > etc. They have on-board S3 Savage cards that steal RAM from the main
> > RAM.
>
> Aha, another. You're the fourth or fifth person with this problem. I
> have a patch very similar to yours. What my patch does is only clear
> bit 7, which is what was experimentally determined to disable the Write
> Memory Queue. So far it seems that only KM133 (KT133 w/onboard S3
> Savage) are afflicted.
Well, these boards use KL133s (not KM133s). The KL133 also has an
integrated S3 ProSavage card.
Maybe another bit seems to need setting somewhere. But where?
> However, the patch isn't being accepted until an explanation from VIA is
> obtained (apparently the head kernel honcho's were explicitly told to
> clear bit 5). I'm working on that now.
I've been told the same. Clearing bit 5 is apparently necessary to
prevent IDE crruption. Asus lists two motherboards, one with a KL133,
one with a KL133A. It looks like the motherboards using KL133s are
broken, and the KL133As work.
How bad is "not clearing bit 5"?
How bad is
if ((device_id = kl133) || (device_id = km133)) {
/* Don't clear bit 5 */
}
Is it possible to clear bit 5, but not bit X, to fix it?
> --
> -Steven
> In a time of universal deceit, telling the truth is a revolutionary act.
> -- George Orwell
> He's alive. He's alive! Oh, that fellow at RadioShack said I was mad!
> Well, who's mad now?
> -- Montgomery C. Burns
--
Berend De Schouwer