New: BUG: Display gets corrupted when using lxfb driver on a GeodeLX 5535 based chipset

Bugme-new Andrew Morton 2 participants 3 messages Mar 9, 2008 1 message not in the archive Framebuffer layer

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Andrew Morton

author

2008-03-09 18:55 UTC #1 lore raw

Quoted 37 lines · On Sun, 9 Mar 2008 08:55:52 -0700 (PDT) [email protected] wrote:

http://bugzilla.kernel.org/show_bug.cgi?id=10205
Summary: BUG: Display gets corrupted when using lxfb driver on a
GeodeLX 5535 based chipset
Product: Drivers
Version: 2.5
KernelVersion: 2.6.24.2
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Console/Framebuffers
AssignedTo: [email protected]
ReportedBy: [email protected]
Latest working kernel version:
None or unknown
Earliest failing kernel version:
Latest version
Distribution:
Debian Stable (Etch)
Hardware Environment:
AMD Geode 32 bit A830 board, 5536 chipset based embedded computer (TFT 10" 800x600), with GeodeLX embedded GPU. It's webpage is at:
http://www.winmatev.com.tw/PPc/PPcSpec.asp?Prod=03_0013&Typeid=03020101
I own a cheaper version using GeodeGX 500 processor, 256MiB RAM, no touchscreen.
Software Environment:
Debian 4.0 Stable (Etch), Kernel 2.4.22.2 vanilla + AUFS patch (it has nothing to do with graphics, but BTW...), all i386, kernel specifically compiled for Geode GX/LX Processor target (but also does not work for generic i386 target).
Problem Description:
I get a blurry screen when trying to enable Framebuffer, vga=788 option (800x600). Screen gets corrupted, but when I start X.org, it shows

Quoted 9 lines

Ok, until I switch again to console. Everything works fine with Vesa FB, except that, of course, it's more CPU consuming and slower [supposedly]. When blurry, screen looks like it was under a lake.
Steps to reproduce:
1) Compile the kernel, include support for GeodeLX Framebuffer.
2) Install the kernel on the machine
3) Boot it up, adding vga=788 mode to bootloader.
4) Screen gets completely blurry until X.org starts.

Guys, this is a post-2.6.24 regression hence needs running-around-with-your-hair-on-fire priority please.

Can anyone think what we did to cause this? Recent changes to drivers/video/geode/ look pretty tame.

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Rafael J. Wysocki

2008-03-09 21:32 UTC #2 lore raw

Quoted 49 lines · Andrew Morton

Quoted 37 lines · On Sun, 9 Mar 2008 08:55:52 -0700 (PDT) [email protected] wrote:
http://bugzilla.kernel.org/show_bug.cgi?id=10205
Summary: BUG: Display gets corrupted when using lxfb driver on a
GeodeLX 5535 based chipset
Product: Drivers
Version: 2.5
KernelVersion: 2.6.24.2
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Console/Framebuffers
AssignedTo: [email protected]
ReportedBy: [email protected]
Latest working kernel version:
None or unknown
Earliest failing kernel version:
Latest version
Distribution:
Debian Stable (Etch)
Hardware Environment:
AMD Geode 32 bit A830 board, 5536 chipset based embedded computer (TFT 10" 800x600), with GeodeLX embedded GPU. It's webpage is at:
http://www.winmatev.com.tw/PPc/PPcSpec.asp?Prod=03_0013&Typeid=03020101
I own a cheaper version using GeodeGX 500 processor, 256MiB RAM, no touchscreen.
Software Environment:
Debian 4.0 Stable (Etch), Kernel 2.4.22.2 vanilla + AUFS patch (it has nothing to do with graphics, but BTW...), all i386, kernel specifically compiled for Geode GX/LX Processor target (but also does not work for generic i386 target).
Problem Description:
I get a blurry screen when trying to enable Framebuffer, vga=788 option (800x600). Screen gets corrupted, but when I start X.org, it shows
Quoted 9 lines
Ok, until I switch again to console. Everything works fine with Vesa FB, except that, of course, it's more CPU consuming and slower [supposedly]. When blurry, screen looks like it was under a lake.
Steps to reproduce:
1) Compile the kernel, include support for GeodeLX Framebuffer.
2) Install the kernel on the machine
3) Boot it up, adding vga=788 mode to bootloader.
4) Screen gets completely blurry until X.org starts.

Quoted 1 line

Guys, this is a post-2.6.24 regression

Hm, what exactly makes you think so?

The failing kernel version is 2.6.24.2, so most probably the problem is present in 2.6.24 as well.

Moreover, the reporter didn't specify the last known good kernel, so it might not be a regression at all.

Andrew Morton

author

2008-03-09 22:54 UTC #3 lore raw

Quoted 50 lines · On Sun, 9 Mar 2008 22:31:13 +0100 "Rafael J. Wysocki" <[email protected]> wrote:

Quoted 49 lines · Andrew Morton
Quoted 46 lines · On Sun, 9 Mar 2008 08:55:52 -0700 (PDT) [email protected] wrote:
http://bugzilla.kernel.org/show_bug.cgi?id=10205
Summary: BUG: Display gets corrupted when using lxfb driver on a
GeodeLX 5535 based chipset
Product: Drivers
Version: 2.5
KernelVersion: 2.6.24.2
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Console/Framebuffers
AssignedTo: [email protected]
ReportedBy: [email protected]
Latest working kernel version:
None or unknown
Earliest failing kernel version:
Latest version
Distribution:
Debian Stable (Etch)
Hardware Environment:
AMD Geode 32 bit A830 board, 5536 chipset based embedded computer (TFT 10" 800x600), with GeodeLX embedded GPU. It's webpage is at:
http://www.winmatev.com.tw/PPc/PPcSpec.asp?Prod=03_0013&Typeid=03020101
I own a cheaper version using GeodeGX 500 processor, 256MiB RAM, no touchscreen.
Software Environment:
Debian 4.0 Stable (Etch), Kernel 2.4.22.2 vanilla + AUFS patch (it has nothing to do with graphics, but BTW...), all i386, kernel specifically compiled for Geode GX/LX Processor target (but also does not work for generic i386 target).
Problem Description:
I get a blurry screen when trying to enable Framebuffer, vga=788 option (800x600). Screen gets corrupted, but when I start X.org, it shows Ok, until I switch again to console. Everything works fine with Vesa FB, except that, of course, it's more CPU consuming and slower [supposedly]. When blurry, screen looks like it was under a lake.
Steps to reproduce:
1) Compile the kernel, include support for GeodeLX Framebuffer.
2) Install the kernel on the machine
3) Boot it up, adding vga=788 mode to bootloader.
4) Screen gets completely blurry until X.org starts.

Quoted 3 lines

Quoted 1 line
Guys, this is a post-2.6.24 regression
Hm, what exactly makes you think so?

Beats me. I was probably looking at the wrong report when I decided that.

Quoted 5 lines

The failing kernel version is 2.6.24.2, so most probably the problem is present in 2.6.24 as well.
Moreover, the reporter didn't specify the last known good kernel, so it might not be a regression at all.

Yup.