[Bug 373264] [NEW] intel 855 (GME) fails to set proper resolution (Jaunty regression)

[Vincent Caron]

Public bug reported:

Binary package hint: xserver-xorg-video-intel

I have a Dell 510m Inspiron laptop (Pentium M) with a i855 video chipset
and a 1400x1050 LCD screen. With Ubuntu Hardy it worked like a charm,
without any hack such as the infamous i195resolution. I just upgraded to
Jaunty and the resolution is wrong: it looks lower (somewhat 1024x768)
with still 1400px wide lines wrapping around, in an 'interlacing' style.
Xrandr and xdpyinfo are sure they're running 1400x1050 and obviously the
frame buffer is 1400x1050, although it's displayed in a quite unreadable
"folded" fashion (it's not scrolling, it's wrapping).

I've tried various hacks (using FBDev, explicitly setting Virtual sizes,
etc) to no avail.

# dpkg -l xserver-xorg-video-intel
ii  xserver-xorg-video-intel    2:2.6.3-0ubuntu9            X.Org X server -- Intel i8xx, i9xx display driver

# cat /proc/mtrr 
reg00: base=0x000000000 (    0MB), size= 1024MB, count=1: write-back
reg01: base=0x040000000 ( 1024MB), size=  256MB, count=1: write-back
reg02: base=0x04ff00000 ( 1279MB), size=    1MB, count=1: uncachable
reg03: base=0x0feda0000 ( 4077MB), size=  128KB, count=1: write-through

# cat /etc/X11/xorg.conf
[... comments...]
Section "Monitor"
        Identifier      "Configured Monitor"
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Monitor         "Configured Monitor"
        Device          "Configured Video Device"
EndSection

Section "Device"
        Identifier      "Configured Video Device"
#       Option          "UseFBDev"              "true"
EndSection

# ddcprobe 
vbe: VESA 3.0 detected.
oem: Intel(r)852GM/852GME/855GM/855GME Graphics Chip Accelerated VGA BIOS
vendor: Intel Corporation
product: Intel(r)852GM/852GME/855GM/855GME Graphics Controller Hardware Version 0.0
memory: 832kb
mode: 1280x1024x256
mode: 1280x1024x64k
mode: 1280x1024x16m
mode: 1024x768x256
mode: 1024x768x64k
mode: 1024x768x16m
mode: 640x480x16m
mode: 800x600x64k
mode: 800x600x16m
mode: 640x480x256
mode: 800x600x256
mode: 640x480x64k
edid: 
edid: 1 3
id: 0000
eisa: LPL0000
serial: 00000000
manufacture: 0 2004
input: analog signal.
screensize: 30 23
gamma: 2.200000
dpms: RGB, no active off, no suspend, no standby
dtiming: 1400x1050 at 70
dtiming: 1400x1050 at 70
monitorid: C1147150E07
monitorid: ����xP

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: resolution

-- 
intel 855 (GME) fails to set proper resolution (Jaunty regression)
https://bugs.launchpad.net/bugs/373264
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