[Intel-gfx] Intel Arrandale IGDNG VGA issue

[CSJ]

Dear ykzhao,

In MS Windows, it is normal.
Could you provide some information about where is the MMIIO space for
modifying below values?
clock.n, clock.m1, clock.m2, clock.p1, clock.p2, clock.dot, clock.vco,
clock.m, clock.p

then I can use RW-everything to get the values on Windows,
then, try to set it in Linux as the same values?

thanks,
CSJ

2010/1/28 CSJ <changsijay at gmail.com>

> Dear ykzhao,
>
> This is dmesg by using kernel 2.6.33-rc5 and the screen is black but
> external monitor is OK.
>
> [    9.558076] Linux agpgart interface v0.103
> [    9.561544] agpgart-intel 0000:00:00.0: Intel Ironlake/M Chipset
> [    9.562215] agpgart-intel 0000:00:00.0: detected 32764K stolen memory
> [    9.627322] agpgart-intel 0000:00:00.0: AGP aperture is 256M @
> 0xb0000000
> [    9.638539] [drm] Initialized drm 1.1.0 20060810
> [    9.652006] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ
> 16
> [    9.652094] i915 0000:00:02.0: setting latency timer to 64
> [    9.656600] i915 0000:00:02.0: irq 28 for MSI/MSI-X
> [    9.656607] [drm] set up 31M of stolen space
> [   10.387980] [drm:intel_crtc_mode_set] *ERROR* Couldn't find PLL settings
> for mode!
> [   10.387983] [drm:drm_crtc_helper_set_config] *ERROR* failed to set mode
> on crtc f69b6800
> [   10.395882] Console: switching to colour frame buffer device 210x65
> [   10.396684] [drm:intel_crtc_mode_set] *ERROR* Couldn't find PLL settings
> for mode!
> [   10.396686] [drm:drm_crtc_helper_set_config] *ERROR* failed to set mode
> on crtc f69b6800
> [   10.405432] fb0: inteldrmfb frame buffer device
> [   10.405469] registered panic notifier
> [   10.412285] acpi device:01: registered as cooling_device4
> [   10.412974] input: Video Bus as /class/input/input6
> [   10.413114] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post:
> no)
> [   10.420361] acpi device:13: registered as cooling_device5
> [   10.425291] acpi device:14: registered as cooling_device6
> [   10.425667] input: Video Bus as /class/input/input7
> [   10.425822] ACPI: Video Device [VGA1] (multi-head: yes  rom: no  post:
> no)
> [   10.425956] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on
> minor 0
>
>
>
>
> 2010/1/28 ykzhao <yakui.zhao at intel.com>
>
> On Thu, 2010-01-28 at 12:18 +0800, CSJ wrote:
>> > Hello,
>> >
>>
>> Hi,
>>        Do you have an opportunity to try the 2.6.33-rc5 kernel and see
>> whether
>> the issue still exists?
>>
>> Thanks.
>>        Yakui
>> > I got an issue on Intel Core i5 M540 with LG panel (Max resolution is
>> > 1920x1080).
>> > That screen is fuzzy on the right area on Ubuntu as attached picture.
>> >
>> > And after checking, the root cause is PLL setting in the Intel native
>> > driver.
>> > (drivers/gpu/drm/i915/intel_display.c)
>> >
>> > in intel_igdng_find_best_PLL function, it goes to red lines,
>> >
>> >                                                 continue;
>> >                                         this_err = abs((10000 -
>> > (target*10000/clock.dot)));
>> >                                         if (this_err < err_most) {
>> >                                                 *best_clock = clock;
>> >                                                 /* found on first
>> > matching */
>> >                                                 goto out;
>> >                                         } else if (this_err < err_min)
>> > {
>> >                                                 *best_clock = clock;
>> >                                                 err_min = this_err;
>> >
>> > and the clock settings before function return are:
>> >         clock.n=6
>> >         clock.m1=11
>> >         clock.m2=4
>> >         clock.p1=0
>> >         clock.p2=7
>> >         clock.dot=188571
>> >         clock.vco=1320000
>> >         clock.m=77
>> >         clock.p=7
>> > the kernel version is 2.6.32.6 .
>> >
>> > It will become terrible if I modify the clock setting
>> > manually(forcellu) to the values that
>> > from the the other machine with same chips but CMO panel (the screen
>> > is normal).
>> > (the CMO screen max resolution is 1600x900)
>> >
>> > Is there any suggestion to tune the clock settings?
>> > thanks a lot :)
>> >
>> > CSJ
>> > <changsijay at gmail.com>
>>
>>
>
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