[CentOS] Problem with graphics on latest CentOS 6

[m.roth at 5-cent.us]

Alfred von Campe wrote:
> Am I the only one seeing this issue?  Or is it that so few people are
> still running CentOS 6.x?  Quick summary, on a very recent Dell
> motherboard using the on-board vide and booting the latest CentOS 6 kernel
> with the “vga=xxx” parameter set to any non-default value results in
> unusable X11 graphics.
>

Sorry. I run CentOS 6 at home, may be just the previous kernel, but no
issues.

     mark


> Alfred
>
>> On Oct 29, 2017, at 15:29, Alfred von Campe <alfred at von-campe.com>
>> wrote:
>>
>> The thread "Problems with kernel-3.10.0-693.5.2.el7.x86_64” reminded me
>> that I have a similar problem but on the latest CentOS 6 kernel I’ve
>> been meaning to report.  Here is the relevant system information:
>>
>> Linux ssg003.bose.com 2.6.32-696.13.2.el6.i686 #1 SMP Thu Oct 5 20:42:25
>> UTC 2017 i686 i686 i386 GNU/Linux
>>
>> 00:02.0 VGA compatible controller: Intel Corporation Device 5912 (rev
>> 04) (prog-if 00 [VGA controller])
>>        Subsystem: Dell Device 07a2
>>        Flags: bus master, fast devsel, latency 0, IRQ 11
>>        Memory at f6000000 (64-bit, non-prefetchable) [size=16M]
>>        Memory at e0000000 (64-bit, prefetchable) [size=256M]
>>        I/O ports at f000 [size=64]
>>        Expansion ROM at <unassigned> [disabled]
>>        Capabilities: [40] Vendor Specific Information: Len=0c <?>
>>        Capabilities: [70] Express Root Complex Integrated Endpoint, MSI
>> 00
>>        Capabilities: [ac] MSI: Enable- Count=1/1 Maskable- 64bit-
>>        Capabilities: [d0] Power Management version 2
>>        Capabilities: [100] #1b
>>        Capabilities: [200] Address Translation Service (ATS)
>>        Capabilities: [300] #13
>>
>> I have about 100 Dell desktops deployed with CentOS 6 all using the
>> built-in motherboard graphics.  But on a Dell Optiplex 5050 with an
>> Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz CPU and the above graphics card,
>> the X11 login screen is all distorted and unusable.  There is a simple
>> solution: if I remove the "vga=0x31b” parameter from the kernel boot
>> command it works just fine.  However, I would prefer to have a usable
>> alternate console on our 1900x1200 monitors, but any value I tried for
>> the vga parameter results in a distorted login screen.
>>
>> Any ideas what may be causing this?  This is only an issue on the very
>> latest chipset.  On the next most recent Dell desktops we have (Intel(R)
>> Core(TM) i5-4590 CPU @ 3.30GHz) I do not have this issue.  Here is the
>> VGA controller info:
>>
>> 00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th
>> Gen Core Processor Integrated Graphics Controller (rev 06) (prog-if 00
>> [VGA controller])
>>        Subsystem: Dell Device 05a4
>>        Flags: bus master, fast devsel, latency 0, IRQ 28
>>        Memory at f7800000 (64-bit, non-prefetchable) [size=4M]
>>        Memory at e0000000 (64-bit, prefetchable) [size=256M]
>>        I/O ports at f000 [size=64]
>>        Expansion ROM at <unassigned> [disabled]
>>        Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
>>        Capabilities: [d0] Power Management version 2
>>        Capabilities: [a4] PCI Advanced Features
>>        Kernel driver in use: i915
>>        Kernel modules: i915
>>
>> Does anyone else have a similar issue and found a better solution?
>>
>> Alfred
>
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