i915: 2.6.36: Monitor incorrectly detects 1920x1199
Mario 'BitKoenig' Holbe
Mario.Holbe at TU-Ilmenau.DE
Fri Jan 14 07:19:51 PST 2011
Hello,
starting with 2.6.36 my monitor detects a resolution of 1920x1199
instead of 1920x1200. The monitor displays 1920x1199 on its OSD, and as
a result, I guess, the display is blurred in the middle section (top to
down) - most likely due to stretching applied by the monitor.
This issue shows up when loading i915 (KMS enabled) with 2.6.37 and
2.6.36 (also 2.6.36.2). With 2.6.35 (up to 2.6.35.10) the monitor
correctly detects (and displays on OSD) 1920x1200 and doesn't blur
anything.
The Chipset is an Intel G35 on an Asus P5E-V HDMI, the monitor is a
Yuraku YV24WBH1 connected via DVI (DVI to HDMI adapter, the board
doesn't have a separate DVI port).
The `fbset' output with 2.6.37 and 2.6.35.10 doesn't differ:
mode "1920x1200"
geometry 1920 1200 1920 1200 32
timings 0 0 0 0 0 0 0
rgba 8/16,8/8,8/0,0/0
endmode
dmesg excerpt for 2.6.37:
[ 2.733019] efifb: probing for efifb
[ 2.744452] efifb: framebuffer at 0xd0000000, mapped to 0xf8280000, using 7552k, total 7552k
[ 2.769712] efifb: mode is 1600x1200x32, linelength=6400, pages=1
[ 2.787964] efifb: scrolling: redraw
[ 2.798678] efifb: Truecolor: size=8:8:8:8, shift=24:16:8:0
[ 2.927422] fb0: EFI VGA frame buffer device
[ 71.202957] [drm] Initialized drm 1.1.0 20060810
[ 71.374419] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 71.374423] i915 0000:00:02.0: setting latency timer to 64
[ 71.474329] i915 0000:00:02.0: irq 44 for MSI/MSI-X
[ 71.669097] [drm] initialized overlay support
[ 71.942025] fb: conflicting fb hw usage inteldrmfb vs EFI VGA - removing generic driver
[ 72.223827] fb0: inteldrmfb frame buffer device
[ 72.223829] drm: registered panic notifier
[ 72.223961] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
[ 87.492007] [drm] GMBUS timed out, falling back to bit banging on pin 0 [i915 gmbus disabled]
[ 87.572007] [drm] GMBUS timed out, falling back to bit banging on pin 0 [i915 gmbus disabled]
[ 87.652006] [drm] GMBUS timed out, falling back to bit banging on pin 0 [i915 gmbus disabled]
[ 87.732007] [drm] GMBUS timed out, falling back to bit banging on pin 0 [i915 gmbus disabled]
[ 87.812007] [drm] GMBUS timed out, falling back to bit banging on pin 0 [i915 gmbus disabled]
[ 87.892007] [drm] GMBUS timed out, falling back to bit banging on pin 0 [i915 gmbus disabled]
[ 87.972008] [drm] GMBUS timed out, falling back to bit banging on pin 0 [i915 gmbus disabled]
[ 88.052006] [drm] GMBUS timed out, falling back to bit banging on pin 0 [i915 gmbus disabled]
[ 89.692006] [drm] GMBUS timed out, falling back to bit banging on pin 6 [i915 gmbus reserved]
[ 89.772006] [drm] GMBUS timed out, falling back to bit banging on pin 6 [i915 gmbus reserved]
[ 89.852006] [drm] GMBUS timed out, falling back to bit banging on pin 6 [i915 gmbus reserved]
[ 89.932007] [drm] GMBUS timed out, falling back to bit banging on pin 6 [i915 gmbus reserved]
[ 90.012007] [drm] GMBUS timed out, falling back to bit banging on pin 6 [i915 gmbus reserved]
[ 90.092006] [drm] GMBUS timed out, falling back to bit banging on pin 6 [i915 gmbus reserved]
[ 90.172006] [drm] GMBUS timed out, falling back to bit banging on pin 6 [i915 gmbus reserved]
[ 90.252006] [drm] GMBUS timed out, falling back to bit banging on pin 6 [i915 gmbus reserved]
dmesg excerpt for 2.6.35.10:
[ 3.401792] efifb: probing for efifb
[ 3.412804] efifb: framebuffer at 0xd0000000, mapped to 0xf8280000, using 3072k, total 3072k
[ 3.438065] efifb: mode is 1024x768x32, linelength=4096, pages=1
[ 3.456058] efifb: scrolling: redraw
[ 3.466773] efifb: Truecolor: size=8:8:8:8, shift=24:16:8:0
[ 3.540728] fb0: EFI VGA frame buffer device
[ 52.667436] [drm] Initialized drm 1.1.0 20060810
[ 52.824746] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 52.824750] i915 0000:00:02.0: setting latency timer to 64
[ 52.901066] i915 0000:00:02.0: irq 47 for MSI/MSI-X
[ 52.901076] [drm] set up 7M of stolen space
[ 53.255059] [drm] initialized overlay support
[ 53.806061] fb: conflicting fb hw usage inteldrmfb vs EFI VGA - removing generic driver
[ 54.171524] fb0: inteldrmfb frame buffer device
[ 54.171525] drm: registered panic notifier
[ 54.171681] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
The monitor's EDID information via `get-edid | parse-edid':
# EDID version 1 revision 3
Section "Monitor"
# Block type: 2:0 3:fc
Identifier "MB24W"
VendorName "NTS"
ModelName "MB24W"
# Block type: 2:0 3:fc
# Block type: 2:0 3:fd
HorizSync 30-74
VertRefresh 50-61
# Max dot clock (video bandwidth) 160 MHz
# Block type: 2:0 3:ff
# DPMS capabilities: Active off:yes Suspend:no Standby:no
Mode "1920x1200" # vfreq 59.950Hz, hfreq 74.038kHz
DotClock 154.000000
HTimings 1920 1968 2000 2080
VTimings 1200 1203 1209 1235
Flags "-HSync" "+VSync"
EndMode
# Block type: 2:0 3:fc
# Block type: 2:0 3:fd
# Block type: 2:0 3:ff
EndSection
PS: I mailed this to lkml about a week ago, maybe dri-devel@ will suit
better?
regards
Mario
--
File names are infinite in length where infinity is set to 255 characters.
-- Peter Collinson, "The Unix File System"
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