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acbc46e708
Not a full list since not all can easily be tested but hey, better than nothing. See https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2181 Assisted-by: Claude:claude-claude-opus-4-6 Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2187>
106 lines
4 KiB
Python
106 lines
4 KiB
Python
# SPDX-License-Identifier: MIT
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#
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# Tests for XFree86-VidModeExtension.
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import struct
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import pytest
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from proto import vidmode
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from xclient import Extension, X11Error, X11Reply
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class TestVidModeSwitchToMode:
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@pytest.mark.swapped_client
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@pytest.mark.xorg_only
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def test_switch_to_mode_fields_swapped(self, xserver, xclient_swapped):
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"""
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SProcVidModeSwitchToMode previously only swapped stuff->screen.
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All mode-line fields (dotclock, hdisplay, …) were left in
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wire byte order, so ProcVidModeSwitchToMode could never match
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them against any existing mode → BadValue.
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Strategy: query the current mode with GetModeLine, then send
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the same timings back via SwitchToMode. With the fix the
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values match → success. Without the fix the garbled timings
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don't match anything → BadValue error.
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Fixed in commit 751e631e1c99 ("Xext/vidmode: fix
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SProcVidModeSwitchToMode swapping only screen field").
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"""
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conn = xclient_swapped
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ext = conn.query_extension(Extension.XF86VIDMODE)
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if not ext:
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pytest.skip("XF86-VidModeExtension not available")
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req = vidmode.QueryVersionRequest(opcode=ext.opcode)
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conn.send_request(req.to_bytes(">"))
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resp = conn.recv_response(timeout=5.0)
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if not isinstance(resp, X11Reply):
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pytest.skip("VidMode QueryVersion failed")
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# Get the current mode line so we can echo it back.
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# xXF86VidModeGetModeLineReply (v2, 52 bytes):
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# [8] dotclock(4)
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# [12] hdisplay(2) hsyncstart(2)
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# [16] hsyncend(2) htotal(2)
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# [20] hskew(4)
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# [24] vdisplay(2) vsyncstart(2)
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# [28] vsyncend(2) vtotal(2)
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# [32] flags(4)
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# [36] privsize(4)
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req = vidmode.GetModeLineRequest(
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opcode=ext.opcode,
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screen=0,
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)
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conn.send_request(req.to_bytes(">"))
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resp = conn.recv_response(timeout=5.0)
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if isinstance(resp, X11Error):
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pytest.skip("GetModeLine not supported (VidMode not initialised?)")
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assert isinstance(resp, X11Reply), f"Expected reply, got {resp}"
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assert len(resp.data) >= 40, f"Reply too short: {len(resp.data)}"
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dotclock = struct.unpack_from(">I", resp.data, 8)[0]
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hdisplay = struct.unpack_from(">H", resp.data, 12)[0]
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hsyncstart = struct.unpack_from(">H", resp.data, 14)[0]
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hsyncend = struct.unpack_from(">H", resp.data, 16)[0]
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htotal = struct.unpack_from(">H", resp.data, 18)[0]
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hskew = struct.unpack_from(">I", resp.data, 20)[0]
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vdisplay = struct.unpack_from(">H", resp.data, 24)[0]
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vsyncstart = struct.unpack_from(">H", resp.data, 26)[0]
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vsyncend = struct.unpack_from(">H", resp.data, 28)[0]
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vtotal = struct.unpack_from(">H", resp.data, 30)[0]
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flags = struct.unpack_from(">I", resp.data, 32)[0]
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# Switch to the same mode — should succeed.
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req = vidmode.SwitchToModeRequest(
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opcode=ext.opcode,
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screen=0,
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dotclock=dotclock,
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hdisplay=hdisplay,
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hsyncstart=hsyncstart,
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hsyncend=hsyncend,
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htotal=htotal,
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hskew=hskew,
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vdisplay=vdisplay,
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vsyncstart=vsyncstart,
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vsyncend=vsyncend,
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vtotal=vtotal,
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flags=flags,
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privsize=0,
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)
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conn.send_request(req.to_bytes(">"))
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resp = conn.recv_response(timeout=2.0)
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assert xserver.is_alive, "Server crashed"
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# With the fix: no response (void request, success).
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# Without the fix: BadValue error because the garbled
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# timing fields don't match any mode.
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if resp is not None:
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assert not isinstance(resp, X11Error), (
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f"SwitchToMode returned error {resp} - "
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f"mode-line fields not byte-swapped in "
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f"SProcVidModeSwitchToMode"
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)
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