[Bug 69528] New: intel driver shows blank screen when set to UXA only after cold start

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69528

          Priority: medium
            Bug ID: 69528
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: intel driver shows blank screen when set to UXA only
                    after cold start
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: s.kno at web.de
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Hardware: Dell Dimension 2400, Intel 845G (Intel 82845G/G[Brookdale-G]/GE rev
01)
Software: current ArchLinux, xorg-server-1.14.3-1, xf86-video-intel-2.21.15-1

newly installed system
with default rendering method (SNA?) X started fine but showed only reduced
colors (256?)
so I set it to UXA (as described in the Archlinux Wiki)
then X worked fine at first
but after a cold start X showed only a blank screen (black with only the mouse
pointer)
then I set it back to default setting (SNA?) and restarted X
as before X started fine but with reduced colors (256?)
then I set it back to UXA again and restarted X
and it suddenly worked again
after cold start again only blank screen (black with only the mouse pointer)


Also, no error messages in /var/log/Xorg.0.log.
Switching consoles doesn't help.
Cold start with default settings (SNA?) works.


I would suggest it could be a problem with initial hardware state when the
driver is set to UXA. It might be specific to the chipset or even the
system/bios.

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