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Old 12-04-2008, 09:48 PM
Moritz Muehlenhoff
 
Default Bug#338766: linux-image-2.6.14-1-386: on console, i128t2r2 chipset, displays only upper half of the screen (12.5 lines in 80x25 mode)

On Sat, Nov 12, 2005 at 02:15:01PM +0100, Miernik wrote:
> Package: linux-image-2.6.14-1-386
> Version: 2.6.14-2
> Severity: important
>
> I have got a PCI video card like this:
>
> 0000:00:0c.0 VGA compatible controller: Number 9 Computer Company Revolution 4 (rev 02) (prog-if 00 [VGA])
> Subsystem: Number 9 Computer Company: Unknown device 0017
> Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 11
> Memory at e4000000 (32-bit, prefetchable) [size=32M]
> Memory at e2000000 (32-bit, prefetchable) [size=32M]
> Memory at df800000 (32-bit, non-prefetchable) [size=4K]
> Memory at df000000 (32-bit, non-prefetchable) [size=64K]
> I/O ports at b800 [size=256]
> Expansion ROM at 20010000 [disabled] [size=64K]
> Capabilities: [80] AGP version 1.0
> Capabilities: [90] Power Management version 1
>
>
> Its a card with LVDS output, and it drives a SGI 1600SW TFT monitor.
>
> Up till I upgraded the kernel everything was ok, but when I upgraded the
> kernel linux-image-2.6-386 2.6.12-10 -> 2.6.14-2, when in colsole mode,
> I use 80x25 char mode, only the upper half of the screen displays, the
> lower half is blank. Exactly half, upper 12 and a half lines are
> displayed.
>
> While blue GRUB window is displaed, full display is OK, but immidiately
> after GRUB, when the kernel is booted, only half is displayed. I boot my
> kernel with this line in GRUB:
>
> kernel /boot/vmlinuz-2.6.14-1-386 root=/dev/hdc1 ro
>
> so there is nothing non-standard. It happens immidiately after kernel is
> booted and the 13-th line of the boot sequence is displayed.
>
> This is very strange, I have never seen something like this before.

Does this error still occur with more recent kernel versions?

Cheers,
Moritz



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