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[idd] recovery: unplug monitor without helper

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When LGIddHelper is unavailable, recovery requests could remain
pending until timeout while the virtual monitor stayed connected.
This could leave a logged-out guest without a usable display.

Fall back to departing the IDD monitor for active recovery, then
re-arrive it before normal recovery completes. Serialize monitor
lifecycle changes and preserve recovery ordering across Helper
reconnects, timeouts, and stale responses.
This commit is contained in:
Geoffrey McRae
2026-08-20 16:03:58 +10:00
parent 7b059ad67e
commit 60a51fccdf
6 changed files with 777 additions and 47 deletions
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36
idd/LGIdd/ipc/CPipeServer.h
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@@ -44,17 +44,42 @@ class CPipeServer : private IPipeEndpointHandler,
public IClipboardChannelDoorbell
{
public:
enum class RecoveryResult
{
NORMAL,
ACTIVE,
FAILED,
NO_DISPLAY,
HELPER_UNAVAILABLE,
};
enum class RecoveryDispatch
{
REJECTED,
UNAVAILABLE,
QUEUED,
SENT,
};
using RecoveryHandler = void (*)(void * opaque,
uint64_t route, uint64_t session, uint32_t serial, bool active,
LGPipeMsg::Type result);
RecoveryResult result);
private:
CPipeEndpoint m_endpoint;
CClipboardChannel m_clipboard;
CSRWLock m_queueLock;
std::vector<LGPipeMsg> m_queue;
bool m_recoveryValid = false;
LGPipeMsg m_recoveryRequest = {};
bool m_recoveryValid = false;
bool m_recoveryPending = false;
bool m_recoveryHelperActive = false;
bool m_recoveryReplaySafe = true;
bool m_recoveryActiveValid = false;
LGPipeMsg m_recoveryRequest = {};
LGPipeMsg m_recoveryActiveRequest = {};
LGPipeMsg m_recoveryNewestRequest = {};
uint64_t m_recoveryActiveRoute = 0;
uint64_t m_recoveryNewestRoute = 0;
CSRWLock m_deviceContextLock;
CDeviceContext * m_deviceContext = nullptr;
@@ -115,8 +140,9 @@ class CPipeServer : private IPipeEndpointHandler,
void SetGPUStatus(bool software);
void ResolutionRejected(uint32_t width, uint32_t height,
uint32_t requiredSizeMiB);
bool SetRecovery(void * owner, uint64_t route,
uint64_t session, uint32_t serial, bool active);
RecoveryDispatch SetRecovery(void * owner, uint64_t route,
uint64_t session, uint32_t serial, bool active,
bool replayIfUnavailable = true);
CClipboardChannel& Clipboard() { return m_clipboard; }
bool ClipboardKick(uint64_t epoch) override;