Re: [Xen-users] OpenSuse 11 hvm domU: screen resolution up to 640x480

["Fajar A. Nugraha" <list@xxxxxxxxx>]

On Wed, Nov 9, 2011 at 10:35 AM, jim burns <jim_burn@xxxxxxxxxxxxx> wrote:
> On Tue November 8 2011, 10:05:40 PM, Flavio wrote:
> This won't work for another reason: 'extra=' is a pv config option for passing
> extra kernel options to the boot process, as reflected by /proc/cmdline. Only
> adding it to menu.lst would work, IF xen-fbfront is builtin, and the syntax is
> as Fajar suggested - xen-fbfront.video=32,1280,1024. If it is not builtin, you
> must use the /etc/modprobe.d approach.
>

I lost track of what Flavio is using.

Anyway, if it's PV, using something like
"xen-fbfront.video=16,1280,1024" on kernel command line should work
regardless whether its built-on or module. If it's module, you also
have the option of using /etc/modprobe.d


> However, beyond syntax problems. I doubt this would work at all in an hvm
> domu, as they don't use fbfront - that's a pv driver. (Fajar - you can verify
> this, right?) 'lspci -vvv' will tell you what driver is loaded for your video
> controller. Pls post the output of 'lspci -vvv -s video-device-number', and
> then for the driver mentioned at the end, post 'modinfo driver-name'.

with stdvga=0, you'd get

00:02.0 VGA compatible controller: Cirrus Logic GD 5446 (prog-if 00
[VGA controller])
        Subsystem: XenSource, Inc. Device 0001
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Region 0: Memory at f0000000 (32-bit, prefetchable) [size=32M]
        Region 1: Memory at f3000000 (32-bit, non-prefetchable) [size=4K]
        Expansion ROM at <unassigned> [disabled]
        Kernel modules: cirrusfb

and starting X directly would get you lots of entries like this on Xorg.0.log

[    89.540] (II) CIRRUS(0): Not using default mode "1280x1024" (bad
mode clock/interlace/doublescan)
[    89.540] (II) CIRRUS(0): Not using default mode "1600x1200"
(insufficient memory for mode)
[    89.540] (II) CIRRUS(0): Not using default mode "800x600" (bad
mode clock/interlace/doublescan)

... and

[    89.541] (--) CIRRUS(0): Virtual size is 1024x768 (pitch 1024)
[    89.542] (**) CIRRUS(0): *Default mode "1024x768": 65.0 MHz, 48.4
kHz, 60.0 Hz
[    89.542] (II) CIRRUS(0): Modeline "1024x768"x60.0   65.00  1024
1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz)
[    89.542] (**) CIRRUS(0): *Default mode "800x600": 40.0 MHz, 37.9
kHz, 60.3 Hz
[    89.542] (II) CIRRUS(0): Modeline "800x600"x60.3   40.00  800 840
968 1056  600 601 605 628 +hsync +vsync (37.9 kHz)


-- 
Fajar

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