Postovani g. Rajacic,
sukladno telefonskom razgovoru, dostavljamo Vam
opis problema i hardverske specifikacije doticnog racunala.
Kratki opis
problema:
Problem se javlja pri visokim rezolucijama
(1600x900) sa grafickom karticom. Pojavljuju se treptece horizontalne crte
preko cijelog ekrana kao da nije pogodjena frekvencija osvjezavanja. Problem je
isti na razlicitim ditribucijama (pokusali smo sa zadnjim Debianom i Ubuntuom).
Takodjer i nekoliko drivera (intel, i915,..) daju iste rezultate. Jedino VESA
radi dobro, medjutim nema visoke rezolucije. Takodjer smo pokusali i
konfigurirati Xorg server, medjutim sa forsiranjem nekog odredjenog moda, GDM se
uopce ne pokrece nego izbacuje gresku "Cannot open display". Najveci progres smo
dobili sa konzolom i uvesafb driverom, pri cemu je rezolucija dobra
(1600x900) i nema flickera, medjutim cim se pokrene graficko sucelje,
rezolucija se opet vrati na 800x600.
Hardware
info:
Radi se o HP All-in-One racunalu
sljedecih specifikacija:
product: HP Pro 3420 AiO PC
vendor:
Hewlett-Packard
Motherboard: Quanta / 2AC5
BIOS: AMI version: LEO_707
(11/17/2011)
CPU: Intel(R) Pentium(R) CPU G630 @
2.70GHz
Chipset: Intel Corporation 6 Series/C200 Series
Chipset Family PCI Express
Display:
description: VGA compatible
controller
product: 2nd Generation Core Processor Family Integrated Graphics
Controller
vendor: Intel Corporation
Subsystem: Hewlett-Packard Company Device
2ac5
physical id:
2
bus info:
pci@0000:00:02.0
version:
09
width: 64
bits
clock:
33MHz
capabilities: msi pm vga_controller bus_master
cap_list
configuration:
latency=0
resources: memory:fe000000-fe3fffff memory:c0000000-cfffffff
ioport:f000(size=64)
Ovo prijavljuje "dmesg" prilikom
inicijalizacije:
[ 4.336583] pci 0000:00:02.0: PCI
INT A -> GSI 16 (level, low) -> IRQ 16
[ 4.336587]
pci 0000:00:02.0: setting latency timer to 64
[ 4.365978]
mtrr: type mismatch for c0000000,10000000 old: write-back new:
write-combining
[ 4.365980] [drm] MTRR allocation
failed. Graphics performance may suffer.
[ 4.366190]
pci 0000:00:02.0: irq 46 for MSI/MSI-X
[ 4.366194] [drm]
Supports vblank timestamp caching Rev 1 (10.10.2010).
[
4.366195] [drm] No driver support for vblank timestamp
query.
[ 4.368498] cfg80211: Calling CRDA to update world
regulatory domain
[ 4.423755] acpi device:34: registered as
cooling_device2
[ 4.423909] input: Video Bus as
/devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:00/input/input4
[
4.423963] ACPI: Video Device [GFX0] (multi-head: yes rom: no post:
no)
[ 4.423990] [drm] Initialized i915 1.6.0 20080730 for
0000:00:02.0 on minor 0
Ovo je Xorg.conf:
Section "Device"
Identifier "Card0"
Driver
"intel"
VendorName "Intel
Corporation"
BoardName
"Sandy Bridge Integrated Graphics Controller"
BusID
"PCI:0:2:0"
EndSection
Ovo prijavljuje
framebuffer:
02: None 00.0: 11001 VESA
Framebuffer
[Created at
bios.464]
Unique ID:
rdCR.QgFYtsmQZBC
Hardware Class:
framebuffer
Model: "Intel(R)
Sandybridge/Ivybridge Graphics Controller"
Vendor: "Intel Corporation"
Device: "Intel(R) Sandybridge/Ivybridge Graphics
Controller"
SubVendor: "Intel(R)
Sandybridge/Ivybridge Graphics Chipset Accelerated VGA
BIOS"
Revision:
"Hardware Version 0.0"
Memory
Size: 63 MB + 960 kB
Memory
Range: 0xc0000000-0xc3feffff (rw)
Mode 0x0360: 1600x900 (+1600), 8 bits
Mode 0x0361: 1600x900 (+3200), 16
bits
Mode 0x0362: 1600x900
(+6400), 24 bits
Mode 0x0305:
1024x768 (+1024), 8 bits
Mode
0x0317: 1024x768 (+2048), 16 bits
Mode 0x0318: 1024x768 (+4096), 24 bits
Mode 0x0312: 640x480 (+2560), 24
bits
Mode 0x0314: 800x600
(+1600), 16 bits
Mode 0x0315:
800x600 (+3200), 24 bits
Mode
0x0301: 640x480 (+640), 8 bits
Mode 0x0303: 800x600 (+832), 8 bits
Mode 0x0311: 640x480 (+1280), 16 bits
Mode 0x037d: 1600x900 (+1600), 8
bits
Mode 0x037e: 1600x900
(+3200), 16 bits
Mode 0x037f:
1600x900 (+6400), 24 bits
Config
Status: cfg=new, avail=yes, need=no, active=unknown
Ukoliko trebate detaljnije informacije o hardwareu,
u prilogu se nalazi ispis "hwinfo".
Molimo vas da se raspitate medju kolegama o
mogucnosti rjesavanja ovog problema, jer nam racunalo po ostalim performansama
odgovara za sastavljanje buduce ucionice za pripreme i natjecanja informatickih
olimpijaca.
Unaprijed zahvaljujemo,
uz pozdrave,
Aron Bohr, strucni suradnik
Ivo Separovic, tajnik HSIN-a
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